Fixing Jupyter access denied on Ubuntu 22.04

After the upgrade to Ubuntu 22.04 Jupyter Notebook (on Firefox 99.0.1) would greet me with an Access Denied error. Not exactly conducive to work.

I tried setting access right of the directories (I also thought about access issues given that .local is a hidden directory), but it turns out that creating an explicit configuration helps:

jupyter notebook --generate-config

This creates a file at: ~/.jupyter/jupyter_notebook_config.py

and in this (text) file we’re looking for c.NotebookApp.use_redirect_file, uncomment it, and set it to

c.NotebookApp.use_redirect_file = True

(as explained in the comments; this seems completely fine on a single-user machine).

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