Error loading webview: Error: Could not register service worker: InvalidStateError: Failed to register a ServiceWorker: The document is in an invalid state..

[GiulioIlBen]

Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

When opening a .ipynb extension it raise this error:

Error loading webview: Error: Could not register service worker: InvalidStateError: Failed to register a ServiceWorker: The document is in an invalid state..

This on:

Version: 1.99.3
Commit: 17baf841131aa23349f217ca7c570c76ee87b957
Date: 2025-04-15T23:18:46.076Z
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Linux x64 5.15.0-136-generic snap

Identifier
ms-toolsai.jupyter
Version
2025.3.0
Last Updated
2025-04-25, 13:04:21
Size
19.79MB
Cache
3.11KB

VS Code Version

1.99.3

Jupyter Extension Version

2025.3.0

Jupyter logs

no output found yet... seems it fails before? not sure yet.

Coding Language and Runtime Version

No response

Language Extension Version (if applicable)

No response

Anaconda Version (if applicable)

No response

Running Jupyter locally or remotely?

remotely

[GiulioIlBen]

Solved

Solved. Solution: killall code (source). If you are working remotely remember to run this command on your local machine... :)

Sources:

• https://stackoverflow.com/questions/67698176/error-loading-webview-error-could-not-register-service-workers-typeerror-fai
• Webview Service Worker Error in registration due to invalid document state vscode#125993
• Best explanation: https://stackoverflow.com/questions/77115862/why-is-vs-code-1-82-having-issues-opening-webviews