that is interesting.
Can you check if you you use a version > 11.2.  If not you have to install black and tokenize-rt.
Can you check if you use a custom pyproject.toml file?  It might be related to that.
(You also need edit permission on the notebook but I assume that is not the issue here).

The error seems to be about some malformed/missing config.  Did you define external config somewhere?