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

PS C:\Program Files\Arduino IDE> & ".\Arduino IDE"
PS C:\Program Files\Arduino IDE>
Arduino IDE 2.3.2
Checking for frontend application configuration customizations. Module path: C:\Program Files\Arduino IDE\resources\app\lib\backend\electron-main.js, destination 'package.json': C:\Program Files\Arduino IDE\resources\app\package.json
Setting 'theia.frontend.config.appVersion' application configuration value to: "2.3.2" (type of string)
Setting 'theia.frontend.config.cliVersion' application configuration value to: "0.35.3" (type of string)
Setting 'theia.frontend.config.buildDate' application configuration value to: "2024-02-20T10:04:35.814Z" (type of string)
Frontend application configuration after modifications: {"applicationName":"Arduino IDE","defaultTheme":{"light":"arduino-theme","dark":"arduino-theme-dark"},"defaultIconTheme":"none","electron":{"windowOptions":{}},"defaultLocale":"","validatePreferencesSchema":false,"preferences":{"window.title":"${rootName}${activeEditorShort}${appName}","files.autoSave":"afterDelay","editor.minimap.enabled":false,"editor.tabSize":2,"editor.scrollBeyondLastLine":false,"editor.quickSuggestions":{"other":false,"comments":false,"strings":false},"editor.maxTokenizationLineLength":500,"editor.bracketPairColorization.enabled":false,"breadcrumbs.enabled":false,"workbench.tree.renderIndentGuides":"none","explorer.compactFolders":false},"appVersion":"2.3.2","cliVersion":"0.35.3","buildDate":"2024-02-20T10:04:35.814Z"}
Starting backend process. PID: 5360
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/msa/.arduinoIDE'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2024-06-04T18:23:48.055Z root INFO Backend Object.initialize: 7.7 ms [Finished 0.872 s after backend start]
2024-06-04T18:23:48.056Z root INFO Backend Object.configure: 6.4 ms [Finished 0.873 s after backend start]
2024-06-04T18:23:48.056Z root INFO Backend s.onStart: 4.3 ms [Finished 0.873 s after backend start]
2024-06-04T18:23:48.057Z root INFO Backend s.configure: 0.4 ms [Finished 0.906 s after backend start]
2024-06-04T18:23:48.058Z root INFO Backend d.onStart: 0.3 ms [Finished 0.906 s after backend start]
2024-06-04T18:23:48.059Z root INFO Backend d.configure: 0.2 ms [Finished 0.906 s after backend start]
2024-06-04T18:23:48.061Z root INFO Backend d.initialize: 34.0 ms [Finished 0.907 s after backend start]
2024-06-04T18:23:48.061Z root INFO Backend c.onStart: 0.6 ms [Finished 0.907 s after backend start]
2024-06-04T18:23:48.062Z root INFO Backend a.configure: 1.7 ms [Finished 0.909 s after backend start]
2024-06-04T18:23:48.065Z config INFO >>> Initializing CLI configuration...
2024-06-04T18:23:48.065Z root INFO Backend c.initialize: 0.9 ms [Finished 0.909 s after backend start]
2024-06-04T18:23:48.065Z root INFO Backend R.onStart: 1.2 ms [Finished 0.910 s after backend start]
2024-06-04T18:23:48.067Z config INFO Loading CLI configuration from c:\Users\msa\.arduinoIDE\arduino-cli.yaml...
2024-06-04T18:23:48.068Z daemon INFO Starting daemon from C:\Program Files\Arduino IDE\resources\app\lib\backend\resources\arduino-cli.exe...
2024-06-04T18:23:48.068Z root INFO Backend a.initialize: 0.6 ms [Finished 0.912 s after backend start]
2024-06-04T18:23:48.068Z root INFO Backend w.onStart: 2.1 ms [Finished 0.913 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend r.configure: 3.4 ms [Finished 0.914 s after backend start]
2024-06-04T18:23:48.069Z discovery-log INFO start
2024-06-04T18:23:48.069Z discovery-log INFO start new deferred
2024-06-04T18:23:48.069Z root INFO Backend d.initialize: 1.2 ms [Finished 0.915 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend y.onStart: 3.6 ms [Finished 0.918 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend r.configure: 2.9 ms [Finished 0.918 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend a.onStart: 1.0 ms [Finished 0.921 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend h.configure: 0.9 ms [Finished 0.921 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend s.configure: 0.2 ms [Finished 0.922 s after backend start]
2024-06-04T18:23:48.069Z root INFO Backend l.configure: 0.1 ms [Finished 0.922 s after backend start]
2024-06-04T18:23:48.074Z root INFO Theia app listening on http://127.0.0.1:50143.
2024-06-04T18:23:48.074Z root INFO Finished starting backend application: 5.0 ms [Finished 0.926 s after backend start]
2024-06-04T18:23:48.087Z root WARN The local plugin referenced by local-dir:/c%3A/Users/msa/.arduinoIDE/plugins does not exist.
2024-06-04T18:23:48.087Z root WARN The local plugin referenced by local-dir:/c%3A/Users/msa/.arduinoIDE/extensions does not exist.
2024-06-04T18:23:48.087Z root WARN The local plugin referenced by local-dir:C:\Users\msa\.arduinoIDE\plugins does not exist.
2024-06-04T18:23:48.101Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]},"build_cache":{"compilations_before_purge":10,"ttl":"720h0m0s"},"daemon":{"port":"50051"},"directories":{"data":"C:\\Users\\msa\\AppData\\Local\\Arduino15","downloads":"C:\\Users\\msa\\AppData\\Local\\Arduino15\\staging","user":"C:\\Users\\msa\\Documents\\Arduino"},"library":{"enable_unsafe_install":false},"logging":{"file":"","format":"text","level":"info"},"metrics":{"addr":":9090","enabled":true},"output":{"no_color":false},"sketch":{"always_export_binaries":false},"updater":{"enable_notification":true}}
2024-06-04T18:23:48.101Z config INFO 'directories.data' and 'directories.user' are set in the CLI configuration model.
2024-06-04T18:23:48.101Z config INFO Loaded the CLI configuration.
2024-06-04T18:23:48.110Z config INFO Mapped the CLI configuration: {"dataDirUri":"file:///c%3A/Users/msa/AppData/Local/Arduino15","sketchDirUri":"file:///c%3A/Users/msa/Documents/Arduino","additionalUrls":[],"network":"none","locale":"en"}
2024-06-04T18:23:48.110Z config INFO Validating the CLI configuration...
2024-06-04T18:23:48.267Z config INFO The CLI config is valid.
2024-06-04T18:23:48.267Z config INFO <<< Initialized the CLI configuration.
2024-06-04T18:23:48.369Z root INFO Resolve plugins list: 302.8 ms [Finished 1.221 s after backend start]
2024-06-04T18:23:48.483Z daemon INFO time="2024-06-04T11:23:48-07:00" level=info msg="Using config file: c:\\Users\\msa\\.arduinoIDE\\arduino-cli.yaml"
time="2024-06-04T11:23:48-07:00" level=info msg="arduino-cli.exe version 0.35.3"
time="2024-06-04T11:23:48-07:00" level=info msg="Executing `arduino-cli daemon`"
Daemon is now listening on 127.0.0.1:50144
{"IP":"127.0.0.1","Port":"50144"}
2024-06-04T18:23:48.484Z daemon INFO Daemon is running.
2024-06-04T18:23:48.859Z daemon INFO time="2024-06-04T11:23:48-07:00" level=info msg="Updating libraries index"
2024-06-04T18:23:48.864Z daemon INFO time="2024-06-04T11:23:48-07:00" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
Opening channel for service path '/services/electron-window'.
Opening channel for service path '/services/ide-updater'.
2024-06-04T18:23:52.544Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 652.1 ms [Finished 4.194 s after frontend start]
2024-06-04T18:23:52.544Z root WARN A command editor.action.toggleStickyScroll is already registered.
2024-06-04T18:23:53.070Z root WARN Frontend D.onStart took longer than the expected maximum 100 milliseconds: 342.3 ms [Finished 4.809 s after frontend start]
2024-06-04T18:23:55.063Z root INFO Deploy plugins list: 302.8 ms [Finished 7.915 s after backend start]
2024-06-04T18:24:12.759Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: openpgp: signature expired
2024-06-04T18:24:12.803Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Checking signature" index="C:\\Users\\msa\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\msa\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2024-06-04T18:24:12.807Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loading hardware from: C:\\Users\\msa\\AppData\\Local\\Arduino15\\packages"
2024-06-04T18:24:12.809Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loading package builtin from: C:\\Users\\msa\\AppData\\Local\\Arduino15\\packages\\builtin"
2024-06-04T18:24:12.810Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Checking existence of 'tools' path: C:\\Users\\msa\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2024-06-04T11:24:12-07:00" level=info msg="Loading tools from dir: C:\\Users\\msa\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
2024-06-04T18:24:12.812Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loaded tool" tool="builtin:ctags@5.8-arduino11"
2024-06-04T18:24:12.812Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loaded tool" tool="builtin:dfu-discovery@0.1.2"
2024-06-04T18:24:12.813Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loaded tool" tool="builtin:mdns-discovery@1.0.9"
2024-06-04T18:24:12.819Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loaded tool" tool="builtin:serial-discovery@1.4.1"
2024-06-04T18:24:12.819Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loaded tool" tool="builtin:serial-monitor@0.14.1"
2024-06-04T18:24:12.820Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Loading libraries index file" index="C:\\Users\\msa\\AppData\\Local\\Arduino15\\library_index.json"
2024-06-04T18:24:12.821Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\msa\\AppData\\Local\\Arduino15\\libraries" location=ide
2024-06-04T18:24:12.821Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\msa\\Documents\\Arduino\\libraries" location=user
2024-06-04T18:24:12.823Z 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\msa\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024-06-04T18:24:12.837Z 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\msa\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.

2024-06-04T18:24:12.839Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Updating libraries index"
2024-06-04T18:24:12.842Z daemon INFO time="2024-06-04T11:24:12-07:00" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024-06-04T18:24:12.846Z root INFO core-client-provider [library-index] Downloading index: library_index.tar.bz2


Hi @msa1987.

This error occurs when your system time is incorrect. You should be able to 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 on the right side of the Settings window.
    The Date & time settings section will expand.
  5. Click the "Sync now" button that is under the "Additional settings" section of the page.
  6. Wait for the syncing process to finish.
  7. Close any Arduino IDE windows that are open.
  8. Start Arduino IDE again.

Hopefully this time Arduino IDE will start up fully and work as expected.