Hello everybody.

Whenever I am trying to run a simple cell I receive the following error message now:
Notebook detached. Exception when creating expectation context:
java.net.SocketTimeoutException: Connect Timeout.

After that error message the cluster is disconnected from the notebook. When I reconnect (apparently successfully) and run a cell again the same error appears after some time of waiting. Also when I navigate to my profile the values of "Display Name" and "Groups" are infinitely loading and they are never shown.

Where is the problem? I have tried many things like using multiple different browsers and creating many new clusters with different runtime versions (instead of only focusing on 12.2LTS).

I appreciate every help. Thank you very much. It did work for some time.