Extension activation failure.

I have a Mac Mini and a MacBook. On both of these, when I installed it the first time, it didn't sign in. I had to delete the extension and reinstall it to sign in. After using it for a day, it's not connecting anymore and isn't giving any error. I've attached the screen recording for reference.

Screen.Recording.2026-02-09.at.2.35.23.PM.mov

@Saqlain-ch

Hi @Saqlain-ch, sorry to hear that you are dealing with this - could you ensure the logging level is set to trace in the Colab user settings and share the resulting Colab logs here? The additional information captured by the trace logs will help us to better troubleshoot the issue. Thanks!

@mounikasomisetty

Hi @mounikasomisetty, I've atteched screenshot and text of the output.

[2026-02-09T19:54:56.976Z] [Info] Visual Studio Code: 1.109.0
[2026-02-09T19:54:56.976Z] [Info] Remote: N/A
[2026-02-09T19:54:56.976Z] [Info] App Host: desktop
[2026-02-09T19:54:56.976Z] [Info] Jupyter extension version: 2025.9.1
[2026-02-09T19:55:01.191Z] [Error] Unable to refresh access token
Error: request to https://oauth2.googleapis.com/token failed, reason:
at es._request (/Users/saqlainch/.vscode/extensions/google.colab-0.2.1/out/extension.js:12:3578)
at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
at async t.refreshTokenNoCache (/Users/saqlainch/.vscode/extensions/google.colab-0.2.1/out/extension.js:24:10713)
at async t.refreshAccessTokenAsync (/Users/saqlainch/.vscode/extensions/google.colab-0.2.1/out/extension.js:24:11428)
at async oo.initialize (/Users/saqlainch/.vscode/extensions/google.colab-0.2.1/out/extension.js:70:1889)
at async XR (/Users/saqlainch/.vscode/extensions/google.colab-0.2.1/out/extension.js:72:69217)
at async cA.n (file:///Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:116:13398)
at async cA.m (file:///Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:116:13361)
at async cA.l (file:///Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:116:12817)

@mounikasomisetty

Hi @mounikasomisetty, I've changes logining access to trace and now this is the output logs

[2026-02-09T20:04:44.048Z] [Trace] Qr.provideJupyterServers called with
{
"a": false,
"b": null
}
[2026-02-09T20:04:44.048Z] [Trace] Qr.provideJupyterServers returned (sync)
[]
[2026-02-09T20:04:44.048Z] [Trace] Qr.provideCommands called with
undefined
{
"a": false,
"b": null
}
[2026-02-09T20:04:44.048Z] [Trace] Qr.provideCommands returned a Promise
[2026-02-09T20:04:44.049Z] [Trace] Qr.provideCommands Promise resolved, args and value:
undefined
{
"a": false,
"b": null
}
[
{
"label": "$(symbol-event) Auto Connect",
"description": "1-click connect! Most recently created server, or a new one."
},
{
"label": "$(add) New Colab Server",
"description": "CPU, GPU or TPU."
},
{
"label": "$(link-external) Open Colab Web",
"description": "Open Colab web."
}
]
[2026-02-09T20:04:48.371Z] [Trace] Qr.handleCommand called with
{
"label": "$(add) New Colab Server",
"description": "CPU, GPU or TPU."
}
{
"a": false,
"b": null
}
[2026-02-09T20:04:48.371Z] [Trace] Qr.handleCommand returned a Promise
[2026-02-09T20:04:53.405Z] [Trace] Qr.handleCommand Promise rejected, args and error:
{
"label": "$(add) New Colab Server",
"description": "CPU, GPU or TPU."
}
{
"a": false,
"b": null
}
Error: Timed out waiting for authentication provider 'google' to register.
at xXe.G (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:73789)
at async xXe.getSessions (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:70806)
at async _di.I (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:79065)
at async _di.$getSession (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:80930)

@Saqlain-ch

Thank you for providing that @Saqlain-ch ! Could you also confirm what version of the Colab extension you are using?

@mounikasomisetty

Hi @mounikasomisetty, The version of the Cloab extension is the latest one as I've deleted and installed it multiple times. To be specific, it's 0.2.1, and VS Code 1.109.0, both are on their latest version.

@Saqlain-ch

Thank you for confirming that @Saqlain-ch - I'm not fully sure why this is happening but my guess would be that the authentication pop up is getting blocked, there is a network issue or a corrupted cache. We are still looking into it though.

Sorry your hitting an issue. From the logs, the two relevant pieces are:

Error: request to https://oauth2.googleapis.com/token failed
Error: Timed out waiting for authentication provider 'google' to register.

The google authentication provider will only fail if the extension fails to activate. Activation failures will appear in Output > Extension Host (or Output > Extension Host (Remote), if connected to a remote VS Code server). Can you pass those along?

I have exactly the same issue.

@lasse-meixner

As above, mind passing along your Extension Host logs @lasse-meixner?

@kevineger

@kevineger Sure! When I try to select a new Colab server, it triggers these lines in Output > Extension Host
Let me know if I can provide any other diagnostics or try something.

2026-03-03 17:38:03.444 [error] Error: Timed out waiting for authentication provider 'google' to register.
    at lYe.G (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:73789)
    at async lYe.getSessions (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:70806)
    at async zui.I (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:79065)
    at async zui.$getSession (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:80930) jupyter.kernel.selectJupyterServerKernel {"value":"ms-toolsai.jupyter","_lower":"ms-toolsai.jupyter"}
2026-03-03 17:38:03.444 [error] Error: Timed out waiting for authentication provider 'google' to register.
    at lYe.G (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:73789)
    at async lYe.getSessions (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:70806)
    at async zui.I (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:79065)
    at async zui.$getSession (vscode-file://vscode-app/Applications/Visual%20Studio%20Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:607:80930) jupyter.kernel.selectJupyterServerKernel undefined

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Extension activation failure. #405

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mounikasomisetty commented on Feb 9, 2026

Saqlain-ch commented on Feb 9, 2026

Saqlain-ch commented on Feb 9, 2026

mounikasomisetty commented on Feb 10, 2026

Saqlain-ch commented on Feb 10, 2026

mounikasomisetty commented on Feb 11, 2026

kevineger commented on Feb 23, 2026

lasse-meixner commented on Mar 4, 2026

kevineger commented on Mar 4, 2026

lasse-meixner commented on Mar 4, 2026

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