Error : Failed to save ipynb, cannot read properties of undefined

[MacherelR]

Hi,
I'm currently using vscode with wsl to code in python. this also uses the vscode-jupyter extension. My notebook works fine but sometimes when I do try to save it, I get the following message :
Failed to save 'doc.ipynb' : Cannot read properties of undefined (reading 'logger').
Does anyone know why this happens ?

Thanks in advance
Rémy

[IanMatthewHuff]

@MacherelR Quick question for you. When this happens, could you open Help > Toggle Developer Tools and see if there is a full stack trace for this error? Would be helpful in diagnosing this.

[rlaker]

I recently got this error and this is what the console says (I do not know how to get the "full stack trace").

[ghost]

I had the same problem. The following worked for me:

1. I copied the changes I had made to another file as a backup.
2. I tried to save my original file again. I elected the option to discard when I got the error again.
3. The original file was intact with my changes, and I was able to save my file now.