In Dataproc, everything was fine but after a recent (automatic) upgrade (I think it was July 10), after I create a new cluster in Dataproc (Gateway option checked for accessing applications) and specify an existing bucket where I had all my notebooks, I cannot see my old notebooks stored in Google Cloud Storage.
When I go to JupyterLab I can now see two folders, GCS and Local. I assume my old notebooks should be in the GCS folder as it should point to my bucket, so I double-click on the GCS folder but I am getting an Invalid response error (500).
EDIT: thanks for que suggestion. The question is indeed related to this one where the advice is to navigate inside the GCS folder or the Local folder before trying to create a notebook. But my problem is: I cannot navigate into GCS because when I try, I get the Invalid response error 500.