How can I fix a JupyterLab "Code Editor out of Sync" error message?

Question

I am seeing the error message in my JupyterLab.:

"Code Editor out of Sync. 
Please open your browser JavaScript console for bug report instructions" 

Jupyter Lab version 3.0.3 and Python version 3.7.7. I'm using both Chrome and Safari. I am still seeing the same issue.

Answer 1

Did you download and open your colab file in your local jupyter lab ?
If so, an easy fix is to open your .ipynb colab file in notepad/notepad++ (or any text editor) and replace all \r\n with \n
This worked for me!

Answer 2

I had the same problem after editing my Jupyterlab file in VS Code for Windows and then going back to Jupyterlab. The problem stems from my VS Code line ending settings. To fix the issue with the notebook I opened the notebook in the Jupyterlab Editor (1)

Scrolled down to confirm that line endings were \r\n (2)

Then Ctrl+F to find and replace all \r\n with \n (3)

Line endings should now be \n (4). You can now reopen the notebook.

Thanks @AdvaitShirvaikar for pointing me in the right direction!

Answer 3

Also, an other easy way that I found in my case was that it seems to be sufficient to create a new cell above / below the affected one, copy paste everything over and delete the old one.