It looks like some server extension is expecting notebook v6, but you have notebook v7.
In general a few of the versions listed are pretty outdated, maybe you upgraded just one of the packages but not all of them? By upgrading jupyter what do you mean precisely (what command did you use)?
thanks for looking into this.
It turns out that I was using a venv and modules were being imported from a system wide python installation.
solved that by going to a somewhat different linux distribution
thanks again
Running into the same issue, in my case, caused by
jupyter nbconvert --execute --to html sample.ipynb
File "/home/path/to/env/lib/python3.10/site-packages/jupyter_contrib_nbextensions/nbconvert_support/collapsible_headings.py", line 6, in <module>
from notebook.services.config import ConfigManager
ModuleNotFoundError: No module named 'notebook.services'
No combination of versions between nbconvert and jupyter_contrib_nbextensions seemed to work, but uninstalling the latter fixed the problem.