IDE hangs on startup: "Failed to initialize the CLI configuration"

riverrunner06 · February 6, 2026, 6:31pm

Hello,

I am experiencing much the same issue with 2 Windows 10 PCs when using IDE 2.x

Had ran 2.x on both in the past without issues, it has been a while though.

Recently purchased the Uno R4 WiFi starter kit and was attempting to go through the lessons (even after years of interest in Arduino and accomplishing some success, still learning and have much more to learn). Searched and found this post, it is very similar to what is happening here. I have followed the instructions and have results from Windows Power Shell scan. Will post that. I looked through it and it seems there is an error “ERROR:gpu_init.cc(453)] Passthrough is not supported, GL is disabled” it is the last line.

As someone that is attempting to learn coding this makes little sense to me. Can anyone help with this?

PS C:\Users\river\AppData\Local\Programs\Arduino IDE> & ".\Arduino IDE"
PS C:\Users\river\AppData\Local\Programs\Arduino IDE>
Arduino IDE 2.1.1
Starting backend process. PID: 12276
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/river/.theia'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2026-02-06T18:09:24.192Z root INFO Backend Object.initialize: 2.7 ms [Finished 8.499 s after backend start]
2026-02-06T18:09:24.192Z root INFO Backend Object.configure: 2.2 ms [Finished 8.499 s after backend start]
2026-02-06T18:09:24.193Z root INFO Backend MessagingContribution.onStart: 0.9 ms [Finished 8.499 s after backend start]
2026-02-06T18:09:24.193Z root INFO Backend OSBackendApplicationContribution.configure: 0.3 ms [Finished 8.714 s after backend start]
2026-02-06T18:09:24.194Z root INFO Backend DefaultWorkspaceServer.onStart: 0.2 ms [Finished 8.714 s after backend start]2026-02-06T18:09:24.195Z root INFO Backend PluginLocalizationBackendContribution.configure: 0.1 ms [Finished 8.715 s after backend start]
2026-02-06T18:09:24.196Z root WARN Backend PluginLocalizationBackendContribution.initialize took longer than the expected maximum 50 milliseconds: 215.8 ms [Finished 8.715 s after backend start]
2026-02-06T18:09:24.196Z root INFO Backend TaskBackendApplicationContribution.onStart: 0.2 ms [Finished 8.715 s after backend start]
2026-02-06T18:09:24.197Z root INFO Backend ElectronTokenBackendContribution.configure: 1.5 ms [Finished 8.716 s after backend start]
2026-02-06T18:09:24.198Z config INFO >>> Initializing CLI configuration...
2026-02-06T18:09:24.198Z root INFO Backend PluginDeployerContribution.initialize: 0.3 ms [Finished 8.716 s after backend start]
2026-02-06T18:09:24.198Z root INFO Backend ConfigServiceImpl.onStart: 0.6 ms [Finished 8.717 s after backend start]
2026-02-06T18:09:24.199Z config INFO Loading CLI configuration from c:\Users\river\.arduinoIDE\arduino-cli.yaml...
2026-02-06T18:09:24.200Z root INFO Backend WebviewBackendSecurityWarnings.initialize: 0.3 ms [Finished 8.718 s after backend start]
2026-02-06T18:09:24.200Z root INFO Backend ArduinoDaemonImpl.onStart: 1.2 ms [Finished 8.719 s after backend start]
2026-02-06T18:09:24.200Z root INFO Backend NodeFileUploadService.configure: 2.2 ms [Finished 8.719 s after backend start]
2026-02-06T18:09:24.200Z daemon INFO Starting daemon from C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\node_modules\arduino-ide-extension\build\arduino-cli.exe...
2026-02-06T18:09:24.200Z discovery-log INFO start
2026-02-06T18:09:24.200Z discovery-log INFO start new deferred
2026-02-06T18:09:24.200Z root INFO Backend HostedPluginLocalizationService.initialize: 0.5 ms [Finished 8.720 s after backend start]
2026-02-06T18:09:24.200Z root INFO Backend BoardDiscovery.onStart: 1.2 ms [Finished 8.721 s after backend start]
2026-02-06T18:09:24.200Z root INFO Backend FileDownloadEndpoint.configure: 1.0 ms [Finished 8.721 s after backend start]2026-02-06T18:09:24.200Z root INFO Backend AuthenticationServiceImpl.onStart: 0.3 ms [Finished 8.723 s after backend start]
2026-02-06T18:09:24.200Z root INFO Backend PluginApiContribution.configure: 0.3 ms [Finished 8.723 s after backend start]
2026-02-06T18:09:24.207Z root INFO Backend HostedPluginReader.configure: 0.2 ms [Finished 8.723 s after backend start]
2026-02-06T18:09:24.207Z root INFO Backend HostedPluginReader.configure: 0.0 ms [Finished 8.723 s after backend start]
2026-02-06T18:09:24.208Z root INFO Backend PlotterBackendContribution.configure: 6.8 ms [Finished 8.730 s after backend start]
2026-02-06T18:09:24.210Z root INFO Theia app listening on http://localhost:55789.
2026-02-06T18:09:24.210Z root INFO Finished starting backend application: 10.1 ms [Finished 8.733 s after backend start]2026-02-06T18:09:24.211Z root WARN The local plugin referenced by local-dir:/c%3A/Users/river/.arduinoIDE/plugins does not exist.
2026-02-06T18:09:24.212Z root WARN The local plugin referenced by local-dir:/c%3A/Users/river/.arduinoIDE/extensions does not exist.
2026-02-06T18:09:24.212Z root WARN The local plugin referenced by local-dir:C:\Users\river\.arduinoIDE\plugins does not exist.
2026-02-06T18:09:24.372Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.372Z root INFO Resolved "cortex-debug" to a VS Code extension "cortex-debug@1.5.1" with engines:
2026-02-06T18:09:24.373Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.376Z root INFO Resolved "vscode-arduino-tools" to a VS Code extension "vscode-arduino-tools@0.0.2-beta.8" with engines:
2026-02-06T18:09:24.376Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.376Z root INFO Resolved "vscode-builtin-cpp" to a VS Code extension "cpp@1.52.1" with engines:
2026-02-06T18:09:24.377Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.377Z root INFO Resolved "vscode-builtin-json" to a VS Code extension "json@1.46.1" with engines:
2026-02-06T18:09:24.377Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.377Z root INFO Resolved "vscode-builtin-json-language-features" to a VS Code extension "json-language-features@1.46.1" with engines:
2026-02-06T18:09:24.377Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.378Z root INFO Resolved "vscode-language-pack-bg" to a VS Code extension "vscode-language-pack-bg@1.48.3" with engines:
2026-02-06T18:09:24.378Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.378Z root INFO Resolved "vscode-language-pack-cs" to a VS Code extension "vscode-language-pack-cs@1.53.2" with engines:
2026-02-06T18:09:24.379Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.379Z root INFO Resolved "vscode-language-pack-de" to a VS Code extension "vscode-language-pack-de@1.53.2" with engines:
2026-02-06T18:09:24.379Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.379Z root INFO Resolved "vscode-language-pack-es" to a VS Code extension "vscode-language-pack-es@1.53.2" with engines:
2026-02-06T18:09:24.380Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.380Z root INFO Resolved "vscode-language-pack-fr" to a VS Code extension "vscode-language-pack-fr@1.53.2" with engines:
2026-02-06T18:09:24.380Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.381Z root INFO Resolved "vscode-language-pack-hu" to a VS Code extension "vscode-language-pack-hu@1.48.3" with engines:
2026-02-06T18:09:24.381Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.381Z root INFO Resolved "vscode-language-pack-it" to a VS Code extension "vscode-language-pack-it@1.53.2" with engines:
2026-02-06T18:09:24.381Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.382Z root INFO Resolved "vscode-language-pack-ja" to a VS Code extension "vscode-language-pack-ja@1.53.2" with engines:
2026-02-06T18:09:24.382Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.382Z root INFO Resolved "vscode-language-pack-ko" to a VS Code extension "vscode-language-pack-ko@1.53.2" with engines:
2026-02-06T18:09:24.382Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.383Z root INFO Resolved "vscode-language-pack-nl" to a VS Code extension "vscode-language-pack-nl@1.48.3" with engines:
2026-02-06T18:09:24.383Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.383Z root INFO Resolved "vscode-language-pack-pl" to a VS Code extension "vscode-language-pack-pl@1.53.2" with engines:
2026-02-06T18:09:24.384Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.384Z root INFO Resolved "vscode-language-pack-pt-BR" to a VS Code extension "vscode-language-pack-pt-BR@1.53.2" with engines:
2026-02-06T18:09:24.384Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.385Z root INFO Resolved "vscode-language-pack-ru" to a VS Code extension "vscode-language-pack-ru@1.53.2" with engines:
2026-02-06T18:09:24.385Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.385Z root INFO Resolved "vscode-language-pack-tr" to a VS Code extension "vscode-language-pack-tr@1.53.2" with engines:
2026-02-06T18:09:24.385Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.386Z root INFO Resolved "vscode-language-pack-uk" to a VS Code extension "vscode-language-pack-uk@1.48.3" with engines:
2026-02-06T18:09:24.386Z root INFO PluginTheiaDirectoryHandler: accepting plugin with path
2026-02-06T18:09:24.386Z root INFO Resolved "vscode-language-pack-zh-hans" to a VS Code extension "vscode-language-pack-zh-hans@1.53.2" with engines:
2026-02-06T18:09:26.148Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]}}
2026-02-06T18:09:26.148Z config ERROR Failed to initialize the CLI configuration.
2026-02-06T18:09:26.161Z root INFO Resolve plugins list: 1962.0 ms [Finished 10.684 s after backend start]
2026-02-06T18:09:26.176Z root INFO Deployed backend plugin "marus25.cortex-debug@1.5.1" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\cortex-debug\extension\dist\extension.js": 15.0 ms [Finished 10.699 s after backend start]
2026-02-06T18:09:26.196Z root INFO Deployed backend plugin "arduino.vscode-arduino-tools@0.0.2-beta.8" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-arduino-tools\extension\dist\bundle": 19.8 ms [Finished 10.719 s after backend start]
2026-02-06T18:09:26.242Z root INFO Deployed backend plugin "vscode.cpp@1.52.1" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-builtin-cpp\extension": 46.7 ms [Finished 10.765 s after backend start]
2026-02-06T18:09:26.261Z root INFO Deployed backend plugin "vscode.json@1.46.1" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-builtin-json\extension": 18.9 ms [Finished 10.784 s after backend start]
2026-02-06T18:09:26.262Z root INFO Deployed backend plugin "vscode.json-language-features@1.46.1" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-builtin-json-language-features\extension\client\dist\jsonMain": 0.5 ms [Finished 10.785 s after backend start]
2026-02-06T18:09:26.591Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-bg@1.48.3" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-bg\extension": 329.5 ms [Finished 11.114 s after backend start]
2026-02-06T18:09:26.930Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-cs@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-cs\extension": 338.6 ms [Finished 11.453 s after backend start]
2026-02-06T18:09:27.349Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-de@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-de\extension": 419.0 ms [Finished 11.872 s after backend start]
2026-02-06T18:09:30.212Z daemon INFO INFO[0000] Using config file: c:\Users\river\.arduinoIDE\arduino-cli.yaml
INFO[0000] arduino-cli.exe version 0.32.3
INFO[0000] Executing `arduino-cli daemon`
Daemon is now listening on 127.0.0.1:55795
{"IP":"127.0.0.1","Port":"55795"}


2026-02-06T18:09:30.212Z daemon INFO Daemon is running.
Opening channel for service path '/services/electron-window-ext'.
Opening channel for service path '/services/electron-window'.
2026-02-06T18:09:30.599Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-es@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-es\extension": 3249.8 ms [Finished 15.122 s after backend start]
Opening channel for service path '/services/ide-updater'.
2026-02-06T18:09:31.042Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-fr@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-fr\extension": 443.1 ms [Finished 15.565 s after backend start]
2026-02-06T18:09:31.043Z daemon INFO INFO[0003] Loading hardware from: C:\Users\river\AppData\Local\Arduino15\packages
INFO[0003] Loading package arduino from: C:\Users\river\AppData\Local\Arduino15\packages\arduino\hardware
INFO[0003] Checking signature                            error="opening signature file: open C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\installed.json.sig: The system cannot find the file specified." index="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\installed.json" signatureFile="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\installed.json.sig"
INFO[0003] Adding monitor tool                           protocol=serial tool="builtin:serial-monitor"
INFO[0003] Loaded platform                               platform="arduino:avr@1.8.7"
INFO[0003] Checking existence of 'tools' path: C:\Users\river\AppData\Local\Arduino15\packages\arduino\tools
INFO[0003] Loading tools from dir: C:\Users\river\AppData\Local\Arduino15\packages\arduino\tools
INFO[0003] Loaded tool                                   tool="arduino:arduinoOTA@1.3.0"
INFO[0003] Loaded tool                                   tool="arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7"
INFO[0003] Loaded tool                                   tool="arduino:avrdude@8.0.0-arduino1"
INFO[0003] Loading package builtin from: C:\Users\river\AppData\Local\Arduino15\packages\builtin
INFO[0003] Checking existence of 'tools' path: C:\Users\river\AppData\Local\Arduino15\packages\builtin\tools
INFO[0003] Loading tools from dir: C:\Users\river\AppData\Local\Arduino15\packages\builtin\tools
INFO[0003] Loaded tool                                   tool="builtin:ctags@5.8-arduino11"
INFO[0003] Loaded tool                                   tool="builtin:dfu-discovery@0.1.2"
INFO[0003] Loaded tool                                   tool="builtin:mdns-discovery@1.0.12"
INFO[0003] Loaded tool                                   tool="builtin:serial-discovery@1.4.3"
INFO[0003] Loaded tool                                   tool="builtin:serial-monitor@0.15.0"
INFO[0003] Checking signature                            index="C:\\Users\\river\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\river\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
INFO[0003] Adding libraries dir                          dir="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\libraries" location=platform
INFO[0003] Loading libraries index file                  index="C:\\Users\\river\\AppData\\Local\\Arduino15\\library_index.json"
INFO[0003] Adding libraries dir                          dir="C:\\Users\\river\\AppData\\Local\\Arduino15\\libraries" location=ide
INFO[0003] Adding libraries dir                          dir="C:\\Users\\river\\Documents\\Arduino\\libraries" location=user

2026-02-06T18:09:31.321Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-hu@1.48.3" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-hu\extension": 279.1 ms [Finished 15.844 s after backend start]
2026-02-06T18:09:31.702Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-it@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-it\extension": 380.1 ms [Finished 16.224 s after backend start]
2026-02-06T18:09:34.880Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-ja@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-ja\extension": 3178.3 ms [Finished 19.403 s after backend start]
2026-02-06T18:09:34.885Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 3849.2 ms [Finished 10.188 s after frontend start]
2026-02-06T18:09:35.266Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-ko@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-ko\extension": 385.7 ms [Finished 19.789 s after backend start]
2026-02-06T18:09:35.268Z root WARN Frontend keybindings.onStart took longer than the expected maximum 100 milliseconds: 381.3 ms [Finished 10.581 s after frontend start]
2026-02-06T18:09:35.440Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-nl@1.48.3" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-nl\extension": 174.2 ms [Finished 19.963 s after backend start]
2026-02-06T18:09:35.871Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-pl@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-pl\extension": 430.9 ms [Finished 20.394 s after backend start]
2026-02-06T18:09:36.236Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-pt-br@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-pt-BR\extension": 364.9 ms [Finished 20.759 s after backend start]
2026-02-06T18:09:36.596Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-ru@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-ru\extension": 359.9 ms [Finished 21.119 s after backend start]
2026-02-06T18:09:36.917Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-tr@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-tr\extension": 321.3 ms [Finished 21.440 s after backend start]
2026-02-06T18:09:37.201Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-uk@1.48.3" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-uk\extension": 283.6 ms [Finished 21.724 s after backend start]
2026-02-06T18:09:37.532Z root INFO Deployed backend plugin "ms-ceintl.vscode-language-pack-zh-hans@1.53.2" from "C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-language-pack-zh-hans\extension": 326.5 ms [Finished 22.050 s after backend start]
2026-02-06T18:09:37.532Z root INFO Deploy plugins list: 1962.0 ms [Finished 22.055 s after backend start]
[16872:0206/101118.393:ERROR:gpu_init.cc(453)] Passthrough is not supported, GL is disabled, ANGLE is

ptillisch · February 6, 2026, 6:45pm

Hi @riverrunner06.

You are using a severely outdated version of Arduino IDE. Please install the latest version 2.3.7 and check to see if that solves the problem.

You can download Arduino IDE 2.3.7 from the "Software" page here:

https://www.arduino.cc/en/software/#ide-download-section

riverrunner06 · February 6, 2026, 6:52pm

Update: have attempted to update driver for Intel UHD Graphics 730 and get response “best driver already installed”.

riverrunner06 · February 7, 2026, 12:29am

The issue started with 2.3.7 and has gotten worse. Will re-install 2.3.7 and give it a try but, nothing is opening past 1.8.18 now.

riverrunner06 · February 7, 2026, 12:46am

Hi ptillisch,

Well I installed 2.3.7 and this time it launched! Had installed it 4 times prior without any success.

Will give it a test run to see how it behaves.

Thank you!

riverrunner06 · February 7, 2026, 6:20pm

Hello ptillisch,

Constructing a sketch and notice “CLI Daemon Offline” at the bottom of the window. Could you advise on this please?

riverrunner06 · February 7, 2026, 8:17pm

Update:

After last install IDE has been behaving well, compiling, uploading, modifying, no problems. CLI Daemon Off Line is showing at the bottom of the window. Is this a problem? If so, how to fix this?

Thanks to all for the help and direction.

ptillisch · February 7, 2026, 8:36pm

Great news!

It is unclear. The "CLI" in that message is referring to Arduino CLI. This is a helper tool used by Arduino IDE. What is meant by "off line" is that Arduino IDE is unable to communicate with the Arduino CLI tool. This is unexpected because Arduino CLI is bundled with the Arduino IDE installation and the IDE automatically starts Arduino CLI on startup.

Arduino CLI provides most of the non-GUI capability to Arduino IDE, so if the IDE is not able to communicate with Arduino CLI that would certainly be a problem. However, compiling and uploading the sketch are some of the primary capabilities provided by Arduino CLI, so the fact that you are able to compile and upload indicates that Arduino IDE is able to communicate with Arduino CLI after all.

In order to allow us to investigate the problem, please post the output Arduino IDE prints to the PowerShell terminal when you start the IDE from the command line, just the same as you did in post #1.

riverrunner06 · February 7, 2026, 8:59pm

Ok, here is what I got:

PS C:\Users\river\AppData\Local\Programs\Arduino IDE> & ".\Arduino IDE"
PS C:\Users\river\AppData\Local\Programs\Arduino IDE>
Arduino IDE 2.3.7
Checking for frontend application configuration customizations. Module path: C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\electron-main.js, destination 'package.json': C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\package.json
Setting 'theia.frontend.config.appVersion' application configuration value to: "2.3.7" (type of string)
Setting 'theia.frontend.config.cliVersion' application configuration value to: "1.3.1" (type of string)
Setting 'theia.frontend.config.buildDate' application configuration value to: "2025-12-17T16:05:25.389Z" (type of string)
Frontend application configuration after modifications: {"applicationName":"Arduino IDE","defaultTheme":{"light":"arduino-theme","dark":"arduino-theme-dark"},"defaultIconTheme":"none","electron":{"windowOptions":{},"showWindowEarly":true,"splashScreenOptions":{},"uriScheme":"arduino-ide"},"defaultLocale":"","validatePreferencesSchema":false,"reloadOnReconnect":true,"uriScheme":"theia","preferences":{"window.title":"${rootName}${activeEditorShort}${appName}","files.autoSave":"afterDelay","editor.minimap.enabled":false,"editor.tabSize":2,"editor.scrollBeyondLastLine":false,"editor.quickSuggestions":{"other":false,"comments":false,"strings":false},"editor.maxTokenizationLineLength":500,"editor.bracketPairColorization.enabled":false,"breadcrumbs.enabled":false,"workbench.tree.renderIndentGuides":"none","explorer.compactFolders":false},"appVersion":"2.3.7","cliVersion":"1.3.1","buildDate":"2025-12-17T16:05:25.389Z"}
Starting backend process. PID: 40792
Showing main window early
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/river/.arduinoIDE'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2026-02-07T20:56:49.258Z root INFO Backend u.initialize: 19.3 ms [Finished 0.370 s after backend start]
2026-02-07T20:56:49.258Z root INFO Backend Object.initialize: 18.4 ms [Finished 0.370 s after backend start]
2026-02-07T20:56:49.259Z root INFO Backend a.initialize: 0.9 ms [Finished 0.370 s after backend start]
2026-02-07T20:56:49.259Z root INFO Backend a.initialize: 0.8 ms [Finished 0.370 s after backend start]
2026-02-07T20:56:49.259Z root INFO Backend u.initialize: 1.0 ms [Finished 0.370 s after backend start]
2026-02-07T20:56:49.260Z root INFO Backend l.initialize: 19.2 ms [Finished 0.371 s after backend start]
2026-02-07T20:56:49.264Z root INFO configured all backend app contributions
2026-02-07T20:56:49.264Z root INFO Backend l.onStart: 0.7 ms [Finished 0.377 s after backend start]
2026-02-07T20:56:49.264Z root INFO Backend d.onStart: 0.1 ms [Finished 0.377 s after backend start]
2026-02-07T20:56:49.265Z root INFO Backend a.onStart: 0.2 ms [Finished 0.377 s after backend start]
2026-02-07T20:56:49.265Z config INFO >>> Initializing CLI configuration...
2026-02-07T20:56:49.265Z root INFO Backend x.onStart: 0.2 ms [Finished 0.377 s after backend start]
2026-02-07T20:56:49.265Z config INFO Loading CLI configuration from c:\Users\river\.arduinoIDE\arduino-cli.yaml...
2026-02-07T20:56:49.265Z daemon INFO Starting daemon from C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\resources\arduino-cli.exe...
2026-02-07T20:56:49.265Z root INFO Backend w.onStart: 0.3 ms [Finished 0.378 s after backend start]
2026-02-07T20:56:49.265Z discovery-log INFO start
2026-02-07T20:56:49.265Z discovery-log INFO start new deferred
2026-02-07T20:56:49.265Z root INFO Backend v.onStart: 0.1 ms [Finished 0.378 s after backend start]
2026-02-07T20:56:49.265Z root INFO Backend a.onStart: 0.0 ms [Finished 0.378 s after backend start]
2026-02-07T20:56:49.271Z root INFO Theia app listening on http://127.0.0.1:59614.
2026-02-07T20:56:49.271Z root INFO Finished starting backend application: 6.3 ms [Finished 0.384 s after backend start]
2026-02-07T20:56:49.272Z root WARN The local plugin referenced by local-dir:/c%3A/Users/river/.arduinoIDE/plugins does not exist.
2026-02-07T20:56:49.272Z root WARN The local plugin referenced by local-dir:/c%3A/Users/river/.arduinoIDE/deployedPlugins does not exist.
2026-02-07T20:56:49.272Z root WARN The local plugin referenced by local-dir:C:\Users\river\.arduinoIDE\plugins does not exist.
2026-02-07T20:56:52.538Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]}}
2026-02-07T20:56:52.538Z config INFO Loading fallback CLI configuration to get 'directories.data' and 'directories.user'
2026-02-07T20:56:53.506Z config INFO Loaded fallback CLI configuration: {"directories":{"user":"C:\\Users\\river\\Documents\\Arduino","data":"C:\\Users\\river\\AppData\\Local\\Arduino15"}}
2026-02-07T20:56:53.506Z config INFO Merged CLI configuration with the fallback: {"directories":{"user":"C:\\Users\\river\\Documents\\Arduino","data":"C:\\Users\\river\\AppData\\Local\\Arduino15"},"board_manager":{"additional_urls":[]}}
2026-02-07T20:56:53.506Z config INFO Loaded the CLI configuration.
2026-02-07T20:56:53.515Z config INFO Mapped the CLI configuration: {"dataDirUri":"file:///c%3A/Users/river/AppData/Local/Arduino15","sketchDirUri":"file:///c%3A/Users/river/Documents/Arduino","additionalUrls":[],"network":"none","locale":"en"}
2026-02-07T20:56:53.515Z config INFO Validating the CLI configuration...
2026-02-07T20:56:53.519Z config INFO The CLI config is valid.
2026-02-07T20:56:53.519Z config INFO <<< Initialized the CLI configuration.
2026-02-07T20:56:53.525Z root INFO creating connection for 1
2026-02-07T20:56:53.546Z root INFO Resolve plugins list: 4280.4 ms [Finished 4.659 s after backend start]
2026-02-07T20:56:53.761Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="arduino-cli version 1.3.1"
2026-02-07T20:56:53.762Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Using config file: c:\\Users\\river\\.arduinoIDE\\arduino-cli.yaml"
2026-02-07T20:56:53.762Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Executing `arduino-cli daemon`"
2026-02-07T20:56:53.779Z daemon INFO Daemon is now listening on 127.0.0.1:59624
{"IP":"127.0.0.1","Port":"59624"}
2026-02-07T20:56:53.779Z daemon INFO Daemon is running.
2026-02-07T20:56:53.844Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Checking signature" index="C:\\Users\\river\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\river\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2026-02-07T20:56:53.845Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loading hardware from: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages"
2026-02-07T20:56:53.845Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loading package arduino from: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware"
2026-02-07T20:56:53.846Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Missing signature file" index="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\installed.json"
2026-02-07T20:56:53.847Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Adding monitor tool" protocol=serial tool="builtin:serial-monitor"
time="2026-02-07T12:56:53-08:00" level=info msg="Loaded platform" platform="arduino:avr@1.8.7"
2026-02-07T20:56:53.849Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Missing signature file" index="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\renesas_uno\\1.5.2\\installed.json"
2026-02-07T20:56:53.849Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Adding monitor tool" protocol=serial tool="builtin:serial-monitor"
2026-02-07T20:56:53.849Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded platform" platform="arduino:renesas_uno@1.5.2"
time="2026-02-07T12:56:53-08:00" level=info msg="Checking existence of 'tools' path: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\tools"
time="2026-02-07T12:56:53-08:00" level=info msg="Loading tools from dir: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\tools"
2026-02-07T20:56:53.850Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:arduinoOTA@1.3.0"
2026-02-07T20:56:53.850Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:arm-none-eabi-gcc@7-2017q4"
2026-02-07T20:56:53.850Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7"
2026-02-07T20:56:53.850Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:avrdude@8.0.0-arduino1"
2026-02-07T20:56:53.850Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:bossac@1.9.1-arduino5"
2026-02-07T20:56:53.851Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:dfu-util@0.11.0-arduino5"
2026-02-07T20:56:53.851Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="arduino:openocd@0.11.0-arduino2"
2026-02-07T20:56:53.851Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loading package builtin from: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\builtin"
2026-02-07T20:56:53.851Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Checking existence of 'tools' path: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2026-02-07T12:56:53-08:00" level=info msg="Loading tools from dir: C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
2026-02-07T20:56:53.851Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="builtin:ctags@5.8-arduino11"
2026-02-07T20:56:53.852Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="builtin:dfu-discovery@0.1.2"
2026-02-07T20:56:53.852Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="builtin:mdns-discovery@1.0.12"
2026-02-07T20:56:53.852Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="builtin:serial-discovery@1.4.3"
2026-02-07T20:56:53.852Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Loaded tool" tool="builtin:serial-monitor@0.15.0"
2026-02-07T20:56:53.862Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Adding libraries dir" dir="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\avr\\1.8.7\\libraries" isSingleLibrary=false location=platform
2026-02-07T20:56:53.863Z daemon INFO time="2026-02-07T12:56:53-08:00" level=info msg="Adding libraries dir" dir="C:\\Users\\river\\AppData\\Local\\Arduino15\\packages\\arduino\\hardware\\renesas_uno\\1.5.2\\libraries" isSingleLibrary=false location=platform
time="2026-02-07T12:56:53-08:00" level=info msg="Loading libraries index file" index="C:\\Users\\river\\AppData\\Local\\Arduino15\\library_index.json"
2026-02-07T20:56:57.193Z daemon INFO time="2026-02-07T12:56:54-08:00" level=info msg="Adding libraries dir" dir="C:\\Users\\river\\AppData\\Local\\Arduino15\\libraries" isSingleLibrary=false location=ide
time="2026-02-07T12:56:54-08:00" level=info msg="Adding libraries dir" dir="C:\\Users\\river\\Documents\\Arduino\\libraries" isSingleLibrary=false location=user
2026-02-07T20:56:57.195Z discovery-log INFO start resolved watching
2026-02-07T20:56:57.208Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 3202.6 ms [Finished 7.930 s after frontend start]
2026-02-07T20:56:57.226Z root WARN A command editor.action.toggleStickyScroll is already registered.
Opening channel for service path '/services/electron-window'.
Opening channel for service path '/services/ide-updater'.
2026-02-07T20:56:57.328Z root INFO Start frontend contributions: 3353.0 ms [Finished 8.039 s after frontend start]
2026-02-07T20:56:57.328Z root INFO Changed application state from 'init' to 'started_contributions'.
2026-02-07T20:56:57.336Z root INFO Changed application state from 'started_contributions' to 'attached_shell'.
2026-02-07T20:56:57.336Z root INFO >>> Restoring the layout state...
2026-02-07T20:56:57.666Z root INFO <<< Nothing to restore.
2026-02-07T20:56:57.687Z root INFO Initialize the workbench layout: 346.5 ms [Finished 8.405 s after frontend start]
2026-02-07T20:56:57.688Z root INFO Changed application state from 'attached_shell' to 'initialized_layout'.
2026-02-07T20:56:57.971Z discovery-log INFO {"eventType":"add","port":{"matchingBoardsList":[{"name":"Arduino UNO R4 WiFi","fqbn":"arduino:renesas_uno:unor4wifi","isHidden":false}],"port":{"address":"COM4","label":"COM4","protocol":"serial","protocolLabel":"Serial Port (USB)","propertiesMap":[["pid","0x1002"],["serialNumber","3CDC75492F88"],["vid","0x2341"]],"hardwareId":"3CDC75492F88"}},"error":""}
Checking for update
Update for version 2.3.7 is not available (latest version: 2.3.7, downgrade is allowed).
2026-02-07T20:57:03.261Z root INFO Replace loading indicator with ready workbench UI (animation): 832.3 ms [Finished 9.244 s after frontend start]
2026-02-07T20:57:03.261Z root INFO Changed application state from 'initialized_layout' to 'ready'.
2026-02-07T20:57:03.261Z root WARN Linked preference "workbench.colorCustomizations" not found.
2026-02-07T20:57:03.267Z root INFO Frontend application start: 4484.4 ms [Finished 12.800 s after backend start]
2026-02-07T20:57:03.283Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976) starting instance
[Object: null prototype] {}
2026-02-07T20:57:03.349Z root INFO Deploy plugins list: 14083.3 ms [Finished 14.462 s after backend start]
2026-02-07T20:57:03.371Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Waiting for backend deployment: 6057.7 ms [Finished 14.092 s after frontend start]
2026-02-07T20:57:03.842Z root ERROR ---- !!!SLOW!!! DURATION: search took 580.696 ms. Args: [{"type":"Updatable"}] ----
2026-02-07T20:57:04.102Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Sync of 23 plugins: 694.2 ms [Finished 14.787 s after frontend start]
2026-02-07T20:57:04.103Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Loading plugin contributions
2026-02-07T20:57:04.103Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Load contributions of 23 plugins: 37.3 ms [Finished 14.824 s after frontend start]
2026-02-07T20:57:04.118Z root WARN 'cpp' language is remapped from 'source.cpp.embedded.macro' to 'source.cpp' scope
2026-02-07T20:57:04.118Z root WARN a registered grammar configuration for 'cpp' language is overridden
2026-02-07T20:57:04.159Z root ERROR [hosted-plugin: 35976] Conflict in settings file Default: Ignoring cortex-debug.armToolchainPath.linux as cortex-debug.armToolchainPath is null
2026-02-07T20:57:04.159Z root ERROR [hosted-plugin: 35976] Conflict in settings file Default: Ignoring cortex-debug.armToolchainPath.osx as cortex-debug.armToolchainPath is null
Conflict in settings file Default: Ignoring cortex-debug.armToolchainPath.windows as cortex-debug.armToolchainPath is null
Conflict in settings file Default: Ignoring cortex-debug.JLinkGDBServerPath.linux as cortex-debug.JLinkGDBServerPath is null
Conflict in settings file Default: Ignoring cortex-debug.JLinkGDBServerPath.osx as cortex-debug.JLinkGDBServerPath is null
Conflict in settings file Default: Ignoring cortex-debug.JLinkGDBServerPath.windows as cortex-debug.JLinkGDBServerPath is null
Conflict in settings file Default: Ignoring cortex-debug.openocdPath.linux as cortex-debug.openocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.openocdPath.osx as cortex-debug.openocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.openocdPath.windows as cortex-debug.openocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.pyocdPath.linux as cortex-debug.pyocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.pyocdPath.osx as cortex-debug.pyocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.pyocdPath.windows as cortex-debug.pyocdPath is null
Conflict in settings file Default: Ignoring cortex-debug.PEGDBServerPath.linux as cortex-debug.PEGDBServerPath is null
Conflict in settings file Default: Ignoring cortex-debug.PEGDBServerPath.osx as cortex-debug.PEGDBServerPath is null
2026-02-07T20:57:04.159Z root ERROR [hosted-plugin: 35976] Conflict in settings file Default: Ignoring cortex-debug.PEGDBServerPath.windows as cortex-debug.PEGDBServerPath is null
Conflict in settings file Default: Ignoring cortex-debug.stutilPath.linux as cortex-debug.stutilPath is null
Conflict in settings file Default: Ignoring cortex-debug.stutilPath.osx as cortex-debug.stutilPath is null
Conflict in settings file Default: Ignoring cortex-debug.stutilPath.windows as cortex-debug.stutilPath is null
Conflict in settings file Default: Ignoring cortex-debug.stlinkPath.linux as cortex-debug.stlinkPath is null
Conflict in settings file Default: Ignoring cortex-debug.stlinkPath.osx as cortex-debug.stlinkPath is null
Conflict in settings file Default: Ignoring cortex-debug.stlinkPath.windows as cortex-debug.stlinkPath is null
Conflict in settings file Default: Ignoring cortex-debug.stm32cubeprogrammer.linux as cortex-debug.stm32cubeprogrammer is null
Conflict in settings file Default: Ignoring cortex-debug.stm32cubeprogrammer.osx as cortex-debug.stm32cubeprogrammer is null
Conflict in settings file Default: Ignoring cortex-debug.stm32cubeprogrammer.windows as cortex-debug.stm32cubeprogrammer is null
2026-02-07T20:57:04.242Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): PluginManagerExtImpl/init()
2026-02-07T20:57:04.244Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-arduino-api@0.1.2 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.342Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(json-language-features@1.88.1 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.345Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(cortex-debug@1.5.1 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.345Z root INFO [hosted-plugin: 35976] Debugger contribution has been registered: cortex-debug
2026-02-07T20:57:04.346Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-arduino-tools@0.1.3 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.347Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(cpp@1.88.1 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.349Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(json@1.88.1 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.350Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-bg@1.48.3 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.350Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-cs@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.351Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-de@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.351Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-es@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.351Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-fr@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.352Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-hu@1.48.3 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.352Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-it@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.352Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-ja@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.353Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-ko@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.353Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-nl@1.48.3 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.353Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-pl@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.353Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-pt-BR@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.354Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-ru@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.354Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-tr@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.354Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-uk@1.48.3 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.354Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-zh-hans@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.354Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): initializing(vscode-language-pack-zh-hant@1.96.0 with C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\plugin-vscode-init)
2026-02-07T20:57:04.357Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): PluginManagerExtImpl/loadPlugin(C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-builtin-json-language-features\extension\client\dist\node\jsonClientMain)
2026-02-07T20:57:04.465Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): PluginManagerExtImpl/loadPlugin(C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-arduino-tools\extension\dist\extension.js)
2026-02-07T20:57:04.517Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): PluginManagerExtImpl/loadPlugin(C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\vscode-arduino-api\extension\dist\extension.js)
2026-02-07T20:57:04.543Z root INFO [hosted-plugin: 35976] calling activation function on VS Code Arduino Tools
calling activation function on Arduino IDE API for VS Code extensions
2026-02-07T20:57:04.545Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Starting plugins.
2026-02-07T20:57:07.695Z root INFO [hosted-plugin: 35976] PLUGIN_HOST(35976): PluginManagerExtImpl/loadPlugin(C:\Users\river\AppData\Local\Programs\Arduino IDE\resources\app\plugins\cortex-debug\extension\dist\extension.js)
2026-02-07T20:57:07.777Z root INFO [hosted-plugin: 35976] Debug configuration provider has been registered: cortex-debug, trigger: 1
2026-02-07T20:57:07.777Z root INFO [hosted-plugin: 35976] calling activation function on Cortex-Debug
2026-02-07T20:57:07.782Z root INFO [hosted-plugin: 35976] GDB server console created
2026-02-07T20:57:07.791Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Start of 23 plugins: 3681.0 ms [Finished 18.513 s after frontend start]
2026-02-07T20:57:07.793Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Waiting for backend deployment: 2.4 ms [Finished 18.516 s after frontend start]
2026-02-07T20:57:07.793Z root INFO [ce43c136-4026-449b-a826-8c1f0c42e42a] Loading plugin contributions
2026-02-07T20:57:07.858Z root INFO [hosted-plugin: 35976] calling activation function on JSON Language Features (built-in)

Topic		Replies	Views
IDE hangs on startup, with no error shown in logs IDE 2.x	8	104	August 18, 2025
My Arduino IDE 2.3.6 is stuck on the loading screen (it keep showing the piping Arduino logo) IDE 2.x	10	854	February 6, 2026
IDE hangs on startup: "Failed to initialize the CLI configuration" IDE 2.x	3	93	April 20, 2025
Arduino 2.0.4 fails to open on Windows 64 install IDE 2.x	8	691	September 25, 2023
IDE hangs on startup: "Failed to initialize the CLI configuration" IDE 2.x	3	152	March 21, 2025

IDE hangs on startup: "Failed to initialize the CLI configuration"

Related topics