I am having the same problem. Set up seems to be going fine, user is fetched properly, connecting to the kernel looks fine, but executing a cell never ends, no debug info is shown or logged except some DataView thing. Nothing suspicious going on or logged on the server side. It does it with prerelease as well as stable version on the latest vscode.

13:23:01.708 [info] Starting Kernel (Python 3 (ipykernel)) for 'Untitled-1.ipynb' (disableUI=false)
13:23:02.170 [info] https://<myurl>/user/hnykda/: Kernel started: 362caddd-...-600901e027bf
13:23:02.403 [info] Started session for kernel startUsingRemoteKernelSpec:0ce63c...4..python3./opt/conda/python./.-m#ipykernel_launcher
13:23:02.671 [info] Kernel successfully started
13:23:02.779 [error] Exception while handling messages: TypeError: First argument to DataView constructor must be an ArrayBuffer

It works on an older version:

@alastairtree @hnykda lets use this issue going forward, as i think this is slightly different though the symptoms are the same.
Also I'd like to close the other issue as there are few other users on that and its been addressed for most users.

I'm sorry you are running into this issue.
Will send a custom VSIX for testing early next week.

Thanks!

@alastairtree @hnykda @hermaneyd Here's the vsix, please install this and let me know how it goes.
Oh yes, you might need to install the latest version of VS Code insiders to try this out.
ms-toolsai-jupyter-insiders.vsix (1).zip

Please could you

• Download the attached file
• Extract this file
• Open VS Code Insiders (install VS Code insiders if you do not already have it, or update to latest) and select the command Install from VSIX
• Select the above extracted VSIX
• When prompted to reload VS Code, please do so
• Try to replicate the issue once again

@DonJayamanne, after installation your vsix in VS Code Insiders I got an extensions host termination. I tried to find any logs but to no avail =( Bisect points out that ms-toolsai.jupyter extension cause it.The same crash I observed with ms-toolsai.jupyter v2024.11.0. By the way v2024.10.0 doesn't have this problem (extensions host termination).

@hermaneyd Sorry you ran into that issue, please can you try this new VSIX
ms-toolsai-jupyter-insiders.vsix (1).zip

@DonJayamanne, the problem still remains – host terminated unexpectedly during kernel detection

• ms-toolsai.jupyter: 2025.1.0
• VSCode Insiders: 1.97.0-insider
• Windows 10