Cannot open Jupyter lab in firefox

Question

I had not used jupyter for a while, I updated ubuntu, firefox, conda, and jupyter lab, and get the error message in the screenshot, I have reinstalled both jupyter lab and firefox and it just won't open.

Error message in firefox:

Answer 1

A solution (check also https://askubuntu.com/a/1390495/1015711 ) is to first

i) Create the configuration file by running the command:

jupyter-notebook --generate-config

ii) Edit the file

~/.jupyter/jupyter_notebook_config.py

and set:

c.NotebookApp.use_redirect_file = False