I had this start happening yesterday as well. No files nor folders shown regardless of which directory I started the notebook in and couldn't open a new Notebook, pasting a token link didn't work for me either.
I found out the issue for me was I had to replace the tornado package with an older version for installing a different package. I updated tornado to the latest version, now everything is working again.
I had this start happening yesterday as well. No files nor folders shown regardless of which directory I started the notebook in and couldn't open a new Notebook, pasting a token link didn't work for me either.
I found out the issue for me was I had to replace the tornado package with an older version for installing a different package. I updated tornado to the latest version, now everything is working again.