IDE hangs on startup: "Error verifying signature: signature expired"

Development Tools IDE 2.x
1

Im not able to open the app as it is loading on the logo page and not moving front...... and also i could not find other replies so have replied to this

PS C:\Users\HP\AppData\Local\Programs\Arduino IDE> &".\Arduino IDE"
PS C:\Users\HP\AppData\Local\Programs\Arduino IDE>
Arduino IDE 2.3.6
Checking for frontend application configuration customizations. Module path: C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\electron-main.js, destination 'package.json': C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\package.json
Setting 'theia.frontend.config.appVersion' application configuration value to: "2.3.6" (type of string)
Setting 'theia.frontend.config.cliVersion' application configuration value to: "1.2.0" (type of string)
Setting 'theia.frontend.config.buildDate' application configuration value to: "2025-04-09T11:26:55.498Z" (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}${appName}","files.autoSave":"afterDelay","editor.minimap.enabled":false,"editor.tabSize":2,"editor.scrollBeyondLastLine":false,"editor.quickSuggestions":{"other":false,"comments":false,"strings":false},"editor.maxTokenizationLineLength":500,"editor.bracketPairColorization.enabled":false,"breadcrumbs.enabled":false,"workbench.tree.renderIndentGuides":"none","explorer.compactFolders":false},"appVersion":"2.3.6","cliVersion":"1.2.0","buildDate":"2025-04-09T11:26:55.498Z"}
Starting backend process. PID: 10272
Showing main window early
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/HP/.arduinoIDE'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2025-09-05T12:20:35.241Z root INFO Backend u.initialize: 32.5 ms [Finished 1.068 s after backend start]
2025-09-05T12:20:35.242Z root INFO Backend Object.initialize: 30.6 ms [Finished 1.068 s after backend start]
2025-09-05T12:20:35.242Z root INFO Backend a.initialize: 1.8 ms [Finished 1.069 s after backend start]
2025-09-05T12:20:35.242Z root INFO Backend a.initialize: 1.4 ms [Finished 1.069 s after backend start]
2025-09-05T12:20:35.242Z root INFO Backend u.initialize: 1.7 ms [Finished 1.069 s after backend start]
2025-09-05T12:20:35.246Z root INFO Backend l.initialize: 32.1 ms [Finished 1.070 s after backend start]
2025-09-05T12:20:35.254Z root INFO configured all backend app contributions
2025-09-05T12:20:35.254Z root INFO Backend l.onStart: 1.7 ms [Finished 1.083 s after backend start]
2025-09-05T12:20:35.255Z root INFO Backend d.onStart: 0.2 ms [Finished 1.083 s after backend start]
2025-09-05T12:20:35.256Z root INFO Backend a.onStart: 0.6 ms [Finished 1.083 s after backend start]
2025-09-05T12:20:35.257Z config INFO >>> Initializing CLI configuration...
2025-09-05T12:20:35.257Z root INFO Backend x.onStart: 0.6 ms [Finished 1.084 s after backend start]
2025-09-05T12:20:35.257Z config INFO Loading CLI configuration from c:\Users\HP\.arduinoIDE\arduino-cli.yaml...
2025-09-05T12:20:35.257Z daemon INFO Starting daemon from C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\resources\arduino-cli.exe...
2025-09-05T12:20:35.257Z root INFO Backend w.onStart: 0.6 ms [Finished 1.085 s after backend start]
2025-09-05T12:20:35.257Z discovery-log INFO start
2025-09-05T12:20:35.257Z discovery-log INFO start new deferred
2025-09-05T12:20:35.257Z root INFO Backend v.onStart: 0.6 ms [Finished 1.086 s after backend start]
2025-09-05T12:20:35.257Z root INFO Backend a.onStart: 0.1 ms [Finished 1.086 s after backend start]
2025-09-05T12:20:35.263Z root INFO Theia app listening on http://127.0.0.1:64993.
2025-09-05T12:20:35.263Z root INFO Finished starting backend application: 5.4 ms [Finished 1.092 s after backend start]
2025-09-05T12:20:35.359Z root WARN The local plugin referenced by local-dir:/c%3A/Users/HP/.arduinoIDE/plugins does not exist.
2025-09-05T12:20:35.359Z root WARN The local plugin referenced by local-dir:/c%3A/Users/HP/.arduinoIDE/deployedPlugins does not exist.
2025-09-05T12:20:35.359Z root WARN The local plugin referenced by local-dir:C:\Users\HP\.arduinoIDE\plugins does not exist.
2025-09-05T12:20:35.382Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]}}
2025-09-05T12:20:35.382Z config INFO Loading fallback CLI configuration to get 'directories.data' and 'directories.user'
2025-09-05T12:20:35.557Z daemon INFO time="2025-09-05T17:50:35+05:30" level=info msg="arduino-cli version 1.2.0"
2025-09-05T12:20:35.576Z daemon INFO time="2025-09-05T17:50:35+05:30" level=info msg="Using config file: c:\\Users\\HP\\.arduinoIDE\\arduino-cli.yaml"
2025-09-05T12:20:35.577Z daemon INFO time="2025-09-05T17:50:35+05:30" level=info msg="Executing `arduino-cli daemon`"
2025-09-05T12:20:35.597Z daemon INFO Daemon is now listening on 127.0.0.1:64994
{"IP":"127.0.0.1","Port":"64994"}
2025-09-05T12:20:35.597Z daemon INFO Daemon is running.
2025-09-05T12:20:35.610Z config INFO Loaded fallback CLI configuration: {"directories":{"user":"C:\\Users\\HP\\Documents\\Arduino","data":"C:\\Users\\HP\\AppData\\Local\\Arduino15"}}
2025-09-05T12:20:35.610Z config INFO Merged CLI configuration with the fallback: {"directories":{"user":"C:\\Users\\HP\\Documents\\Arduino","data":"C:\\Users\\HP\\AppData\\Local\\Arduino15"},"board_manager":{"additional_urls":[]}}
2025-09-05T12:20:35.610Z config INFO Loaded the CLI configuration.
2025-09-05T12:20:35.620Z config INFO Mapped the CLI configuration: {"dataDirUri":"file:///c%3A/Users/HP/AppData/Local/Arduino15","sketchDirUri":"file:///c%3A/Users/HP/Documents/Arduino","additionalUrls":[],"network":"none","locale":"en"}
2025-09-05T12:20:35.620Z config INFO Validating the CLI configuration...
2025-09-05T12:20:35.630Z config INFO The CLI config is valid.
2025-09-05T12:20:35.630Z config INFO <<< Initialized the CLI configuration.
2025-09-05T12:20:35.632Z daemon INFO time="2025-09-05T17:50:35+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2025-09-05T12:20:35.635Z root INFO Resolve plugins list: 375.6 ms [Finished 1.464 s after backend start]
2025-09-05T12:20:37.030Z root INFO creating connection for 1
2025-09-05T12:20:38.722Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 203.2 ms [Finished 3.386 s after frontend start]
2025-09-05T12:20:38.790Z 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'.
2025-09-05T12:20:39.041Z root WARN Frontend keybindings.onStart took longer than the expected maximum 100 milliseconds: 244.8 ms [Finished 3.686 s after frontend start]
2025-09-05T12:20:39.178Z root INFO Start frontend contributions: 760.0 ms [Finished 3.816 s after frontend start]
2025-09-05T12:20:39.179Z root INFO Changed application state from 'init' to 'started_contributions'.
2025-09-05T12:20:39.198Z root INFO Changed application state from 'started_contributions' to 'attached_shell'.
2025-09-05T12:20:39.198Z root INFO >>> Restoring the layout state...
2025-09-05T12:20:40.453Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: signature expired: is your system clock set correctly?
2025-09-05T12:20:40.513Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Checking signature" index="C:\\Users\\HP\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\HP\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2025-09-05T12:20:40.516Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loading hardware from: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages"
2025-09-05T12:20:40.518Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loading package builtin from: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin"
2025-09-05T12:20:40.518Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Checking existence of 'tools' path: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2025-09-05T17:50:40+05:30" level=info msg="Loading tools from dir: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
2025-09-05T12:20:40.520Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loaded tool" tool="builtin:ctags@5.8-arduino11"
2025-09-05T12:20:40.520Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loaded tool" tool="builtin:dfu-discovery@0.1.2"
2025-09-05T12:20:40.520Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loaded tool" tool="builtin:mdns-discovery@1.0.9"
2025-09-05T12:20:40.520Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loaded tool" tool="builtin:serial-discovery@1.4.1"
2025-09-05T12:20:40.521Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loaded tool" tool="builtin:serial-monitor@0.15.0"
2025-09-05T12:20:40.567Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Loading libraries index file" index="C:\\Users\\HP\\AppData\\Local\\Arduino15\\library_index.json"
2025-09-05T12:20:40.568Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\HP\\AppData\\Local\\Arduino15\\libraries" isSingleLibrary=false location=ide
2025-09-05T12:20:40.568Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\HP\\Documents\\Arduino\\libraries" isSingleLibrary=false location=user
2025-09-05T12:20:40.568Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: reading library_index.json: open C:\Users\HP\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2025-09-05T12:20:40.578Z root ERROR The primary packages indexes are missing. Running indexes update before initializing the core gRPC client The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\HP\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

2025-09-05T12:20:40.582Z daemon INFO time="2025-09-05T17:50:40+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2025-09-05T12:20:40.584Z root INFO core-client-provider [library-index] Downloading index: library_index.tar.bz2

2025-09-05T12:20:42.115Z root INFO Deploy plugins list: 6855.7 ms [Finished 7.944 s after backend start]
2025-09-05T12:20:42.124Z root INFO [1e7e01a3-8b3c-4e1e-a6e9-71b98373eb35] Waiting for backend deployment: 2979.6 ms [Finished 6.785 s after frontend start]
2025-09-05T12:20:42.927Z root INFO [hosted-plugin: 4000] PLUGIN_HOST(4000) starting instance
[Object: null prototype] {}
2025-09-05T12:20:43.973Z daemon INFO time="2025-09-05T17:50:43+05:30" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2025-09-05T12:20:44.022Z root INFO [1e7e01a3-8b3c-4e1e-a6e9-71b98373eb35] Sync of 23 plugins: 1904.5 ms [Finished 8.689 s after frontend start]
2025-09-05T12:20:46.909Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: signature expired: is your system clock set correctly?
2025-09-05T12:20:46.923Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Checking signature" index="C:\\Users\\HP\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\HP\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2025-09-05T12:20:46.924Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loading hardware from: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages"
2025-09-05T12:20:46.924Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loading package builtin from: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin"
2025-09-05T12:20:46.924Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Checking existence of 'tools' path: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2025-09-05T17:50:46+05:30" level=info msg="Loading tools from dir: C:\\Users\\HP\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
2025-09-05T12:20:46.925Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loaded tool" tool="builtin:ctags@5.8-arduino11"
2025-09-05T12:20:46.925Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loaded tool" tool="builtin:dfu-discovery@0.1.2"
2025-09-05T12:20:46.925Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loaded tool" tool="builtin:mdns-discovery@1.0.9"
2025-09-05T12:20:46.925Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loaded tool" tool="builtin:serial-discovery@1.4.1"
2025-09-05T12:20:46.925Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loaded tool" tool="builtin:serial-monitor@0.15.0"
2025-09-05T12:20:46.942Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Loading libraries index file" index="C:\\Users\\HP\\AppData\\Local\\Arduino15\\library_index.json"
2025-09-05T12:20:46.943Z root ERROR Detected an error response during the gRPC core client initialization: code: 9, message: Loading index file: reading library_index.json: open C:\Users\HP\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2025-09-05T12:20:46.943Z daemon INFO time="2025-09-05T17:50:46+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\HP\\AppData\\Local\\Arduino15\\libraries" isSingleLibrary=false location=ide
time="2025-09-05T17:50:46+05:30" level=info msg="Adding libraries dir" dir="C:\\Users\\HP\\Documents\\Arduino\\libraries" isSingleLibrary=false location=user
2025-09-05T12:20:46.944Z root ERROR Uncaught Exception:  Error: The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\HP\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

2025-09-05T12:20:46.944Z root ERROR Error: The index of the cores and libraries must be updated before initializing the core gRPC client.
The following problems were detected during the gRPC client initialization:
[library-index] - code: 9, message: Loading index file: reading library_index.json: open C:\Users\HP\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

    at C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\main.js:2:6283973
    at y.evaluateErrorStatus (C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\main.js:2:6283989)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async a.<anonymous> (C:\Users\HP\AppData\Local\Programs\Arduino IDE\resources\app\lib\backend\main.js:2:6283659)
2

Hi @madhukarp.

The cause of the problem is that your system time is incorrect. You can fix it by syncing the system time. I'll provide instructions you can follow to do that:

  1. Right click the Windows Start icon (⊞) on the taskbar.
    A context menu will open.
  2. Select "Settings" from the context menu.
    Windows "Settings" will open.
  3. Select "Time & language" from the navigation panel on the left side of the window.
  4. Select "Date & time" from the list at the right side of the Settings window.
    The "Date & time" settings section will expand.
  5. Click the "Sync now" button that is located under the "Additional settings" section of the window.
  6. Wait for the syncing process to finish.
  7. Close any Arduino IDE windows that are open.
  8. Start Arduino IDE again, as usual.
    ⓘ It is not required to start the IDE from the PowerShell terminal this time.

This time Arduino IDE should start up fully and work as expected.