Arduino IDE 2.3.2 Not Launching New Install

Question

I just installed the Arduino IDE on a new computer from the installer. It opens a window and the arduino icon pulses but never seems to do anything. I ran it from the powershell and got a bunch of errors.

Any idea how to fix the library_index.json not existing?

PowerShell 7.4.2
PS C:\Program Files\Arduino IDE> & '.\Arduino IDE.exe'
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年02月20日T10:04:35.814Z" (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}${appName}","files.autoSave":"afterDelay","editor.minimap.enabled":false,"editor.tabSize":2,"editor.scrollBeyondLastLine":false,"editor.quickSuggestions":{"other":false,"comments":false,"strings":false},"editor.maxTokenizationLineLength":500,"editor.bracketPairColorization.enabled":false,"breadcrumbs.enabled":false,"workbench.tree.renderIndentGuides":"none","explorer.compactFolders":false},"appVersion":"2.3.2","cliVersion":"0.35.3","buildDate":"2024年02月20日T10:04:35.814Z"}
Starting backend process. PID: 20372
Using browser-only version of superagent in non-browser environment
Configuration directory URI: 'file:///c%3A/Users/jmwau/.arduinoIDE'
Configuring to accept webviews on '^.+\.webview\..+$' hostname.
2024年05月13日T19:57:22.348Z root INFO Backend Object.initialize: 4.8 ms [Finished 0.487 s after backend start]
2024年05月13日T19:57:22.349Z root INFO Backend Object.configure: 4.0 ms [Finished 0.487 s after backend start]
2024年05月13日T19:57:22.349Z root INFO Backend s.onStart: 2.1 ms [Finished 0.487 s after backend start]
2024年05月13日T19:57:22.350Z root INFO Backend s.configure: 0.3 ms [Finished 0.512 s after backend start]
2024年05月13日T19:57:22.351Z root INFO Backend d.onStart: 0.2 ms [Finished 0.512 s after backend start]
2024年05月13日T19:57:22.352Z root INFO Backend d.configure: 0.1 ms [Finished 0.512 s after backend start]
2024年05月13日T19:57:22.352Z root INFO Backend d.initialize: 25.1 ms [Finished 0.513 s after backend start]
2024年05月13日T19:57:22.353Z root INFO Backend c.onStart: 0.3 ms [Finished 0.513 s after backend start]
2024年05月13日T19:57:22.353Z root INFO Backend a.configure: 1.2 ms [Finished 0.514 s after backend start]
2024年05月13日T19:57:22.355Z config INFO >>> Initializing CLI configuration...
2024年05月13日T19:57:22.355Z root INFO Backend c.initialize: 0.9 ms [Finished 0.515 s after backend start]
2024年05月13日T19:57:22.355Z root INFO Backend R.onStart: 0.9 ms [Finished 0.515 s after backend start]
2024年05月13日T19:57:22.356Z config INFO Loading CLI configuration from c:\Users\jmwau\.arduinoIDE\arduino-cli.yaml...
2024年05月13日T19:57:22.356Z daemon INFO Starting daemon from C:\Program Files\Arduino IDE\resources\app\lib\backend\resources\arduino-cli.exe...
2024年05月13日T19:57:22.356Z root INFO Backend a.initialize: 0.4 ms [Finished 0.516 s after backend start]
2024年05月13日T19:57:22.356Z root INFO Backend w.onStart: 1.1 ms [Finished 0.517 s after backend start]
2024年05月13日T19:57:22.356Z root INFO Backend r.configure: 1.9 ms [Finished 0.517 s after backend start]
2024年05月13日T19:57:22.356Z discovery-log INFO start
2024年05月13日T19:57:22.356Z discovery-log INFO start new deferred
2024年05月13日T19:57:22.356Z root INFO Backend d.initialize: 0.5 ms [Finished 0.518 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend y.onStart: 2.0 ms [Finished 0.519 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend r.configure: 1.7 ms [Finished 0.520 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend a.onStart: 0.5 ms [Finished 0.521 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend h.configure: 0.4 ms [Finished 0.521 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend s.configure: 0.2 ms [Finished 0.521 s after backend start]
2024年05月13日T19:57:22.357Z root INFO Backend l.configure: 0.1 ms [Finished 0.521 s after backend start]
2024年05月13日T19:57:22.359Z root INFO Theia app listening on http://127.0.0.1:63045.
2024年05月13日T19:57:22.359Z root INFO Finished starting backend application: 2.8 ms [Finished 0.524 s after backend start]
2024年05月13日T19:57:22.367Z root WARN The local plugin referenced by local-dir:/c%3A/Users/jmwau/.arduinoIDE/plugins does not exist.
2024年05月13日T19:57:22.367Z root WARN The local plugin referenced by local-dir:/c%3A/Users/jmwau/.arduinoIDE/extensions does not exist.
2024年05月13日T19:57:22.367Z root WARN The local plugin referenced by local-dir:C:\Users\jmwau\.arduinoIDE\plugins does not exist.
2024年05月13日T19:57:22.374Z config INFO Loaded CLI configuration: {"board_manager":{"additional_urls":[]},"build_cache":{"compilations_before_purge":10,"ttl":"720h0m0s"},"daemon":{"port":"50051"},"directories":{"data":"C:\\Users\\jmwau\\AppData\\Local\\Arduino15","downloads":"C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\staging","user":"C:\\Users\\jmwau\\OneDrive\\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年05月13日T19:57:22.374Z config INFO 'directories.data' and 'directories.user' are set in the CLI configuration model.
2024年05月13日T19:57:22.374Z config INFO Loaded the CLI configuration.
2024年05月13日T19:57:22.377Z config INFO Mapped the CLI configuration: {"dataDirUri":"file:///c%3A/Users/jmwau/AppData/Local/Arduino15","sketchDirUri":"file:///c%3A/Users/jmwau/OneDrive/Documents/Arduino","additionalUrls":[],"network":"none","locale":"en"}
2024年05月13日T19:57:22.377Z config INFO Validating the CLI configuration...
2024年05月13日T19:57:22.377Z config INFO The CLI config is valid.
2024年05月13日T19:57:22.377Z config INFO <<< Initialized the CLI configuration.
2024年05月13日T19:57:22.399Z root INFO Resolve plugins list: 43.4 ms [Finished 0.563 s after backend start]
2024年05月13日T19:57:22.445Z daemon INFO time="2024年05月13日T12:57:22-07:00" level=info msg="Using config file: c:\\Users\\jmwau\\.arduinoIDE\\arduino-cli.yaml"
time="2024年05月13日T12:57:22-07:00" level=info msg="arduino-cli.exe version 0.35.3"
time="2024年05月13日T12:57:22-07:00" level=info msg="Executing `arduino-cli daemon`"
Daemon is now listening on 127.0.0.1:63046
{"IP":"127.0.0.1","Port":"63046"}
2024年05月13日T19:57:22.445Z daemon INFO Daemon is running.
2024年05月13日T19:57:22.504Z daemon INFO time="2024年05月13日T12:57:22-07:00" level=info msg="Updating libraries index"
2024年05月13日T19:57:22.505Z daemon INFO time="2024年05月13日T12:57:22-07:00" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024年05月13日T19:57:23.068Z root INFO Deploy plugins list: 43.4 ms [Finished 1.233 s after backend start]
Opening channel for service path '/services/electron-window'.
Opening channel for service path '/services/ide-updater'.
2024年05月13日T19:57:23.951Z root WARN Frontend a.configure took longer than the expected maximum 100 milliseconds: 137.5 ms [Finished 1.504 s after frontend start]
2024年05月13日T19:57:23.951Z root WARN A command editor.action.toggleStickyScroll is already registered.
2024年05月13日T19:57:24.661Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: openpgp: signature expired
2024年05月13日T19:57:24.669Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Checking signature" index="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2024年05月13日T19:57:24.670Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Loading hardware from: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages"
2024年05月13日T19:57:24.671Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Loading package builtin from: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin"
time="2024年05月13日T12:57:24-07:00" level=info msg="Checking existence of 'tools' path: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2024年05月13日T12:57:24-07:00" level=info msg="Loading tools from dir: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2024年05月13日T12:57:24-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:24-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:24-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
2024年05月13日T19:57:24.671Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
2024年05月13日T19:57:24.671Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
2024年05月13日T19:57:24.671Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Loading libraries index file" index="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\library_index.json"
2024年05月13日T19:57:24.672Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\libraries" location=ide
2024年05月13日T19:57:24.672Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\jmwau\\OneDrive\\Documents\\Arduino\\libraries" location=user
2024年05月13日T19:57:24.673Z 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\jmwau\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024年05月13日T19:57:24.678Z 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\jmwau\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024年05月13日T19:57:24.679Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Updating libraries index"
2024年05月13日T19:57:24.680Z daemon INFO time="2024年05月13日T12:57:24-07:00" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024年05月13日T19:57:24.681Z root INFO core-client-provider [library-index] Downloading index: library_index.tar.bz2
2024年05月13日T19:57:27.210Z daemon INFO time="2024年05月13日T12:57:27-07:00" level=info msg="Updating libraries index"
2024年05月13日T19:57:27.212Z daemon INFO time="2024年05月13日T12:57:27-07:00" level=info msg="Starting download" url="https://downloads.arduino.cc/libraries/library_index.tar.bz2"
2024年05月13日T19:57:29.772Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: openpgp: signature expired
2024年05月13日T19:57:29.780Z daemon INFO time="2024年05月13日T12:57:29-07:00" level=info msg="Checking signature" index="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\package_index.json" signatureFile="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\package_index.json.sig" trusted=true
2024年05月13日T19:57:29.784Z daemon INFO time="2024年05月13日T12:57:29-07:00" level=info msg="Loading hardware from: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages"
2024年05月13日T19:57:29.786Z daemon INFO time="2024年05月13日T12:57:29-07:00" level=info msg="Loading package builtin from: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin"
time="2024年05月13日T12:57:29-07:00" level=info msg="Checking existence of 'tools' path: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loading tools from dir: C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\packages\\builtin\\tools"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loaded tool" tool="builtin:[email protected]"
time="2024年05月13日T12:57:29-07:00" level=info msg="Loading libraries index file" index="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\library_index.json"
time="2024年05月13日T12:57:29-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\jmwau\\AppData\\Local\\Arduino15\\libraries" location=ide
time="2024年05月13日T12:57:29-07:00" level=info msg="Adding libraries dir" dir="C:\\Users\\jmwau\\OneDrive\\Documents\\Arduino\\libraries" location=user
2024年05月13日T19:57:29.786Z 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\jmwau\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024年05月13日T19:57:29.786Z 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\jmwau\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
2024年05月13日T19:57:29.786Z 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\jmwau\AppData\Local\Arduino15\library_index.json: The system cannot find the file specified.
 at C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:622877
 at E.evaluateErrorStatus (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:622893)
 at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
 at async a.<anonymous> (C:\Program Files\Arduino IDE\resources\app\lib\backend\main.js:2:622563)
Closing channel on service path '/services/electron-window'.
Closing channel on service path '/services/ide-updater'.
Stored workspaces roots:
No sketches were scheduled for deletion.

Answer 1

2024年05月13日T19:57:29.772Z root ERROR Detected an error response during the gRPC core client initialization: code: 3, message: Error verifying signature: openpgp: signature expired

This "Error verifying signature: openpgp: signature expired" error occurs when 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 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 time syncing process to finish.
7. Close any Arduino IDE windows that are open.
8. Start Arduino IDE again.

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

• TexasT: I have this same issue except the fix noted above does not work for me. I just get a constant pulsing Arduino logo.
• per1234: @TexasT this answer is specific to the case where startup hangs AND the "Error verifying signature: openpgp: signature expired" error message is present in the logs. There are other causes of Arduino IDE startup hanging. Since you don't have enough information to formulate a high quality Stack Exchange question, please request assistance over on forum.arduino.cc. That will be a more suitable platform for supporting you.