Submission Error - Got more than 1 jupyter server

Hi!

During my seventh submission, I’ve got an unexpected error in the last cell of the Jupyter notebook:

API Key Valid
Saved API Key Successfully!
Submission Error - Got more than 1 jupyter server, selecting the latest session
InvalidJupyterResponse: Got invalid response from jupyter: {“message”: “Forbidden”, “reason”: null}

And my submission isn’t sent…

SOLVED: I changed the browser to Microsoft Edge and the problem was solved.