Juergen Hasch

This looks like the actual `jupyter_contrib_nbextensions` package was not installed correctly. Can you check this using the `conda list` command ?

The nbextensions_configurator uses the Jupyter notebook javascript API. AFAIK there is no way to set the scope (user vs. system) of the configuration settings there.

Now there is https://github.com/jupyter/jupyter_core/pull/96 which disables all extensions. I think an option just to disable nbextensions is a good ides, as you don't need to restart the notebook server. What...

This is the repository for the configurator, not for any actual extensions. Enabling rulers in the editor is easy to do, I created PR https://github.com/ipython-contrib/jupyter_contrib_nbextensions/pull/1296 for this in the jupyter_contrib_nbextensions...

Did you enable the configurator using `jupyter nbextensions_configurator enable --user` ? Do you see in the log when starting the notebook `[jupyter_nbextensions_configurator] enabled 0.4.1` ?

Can you check what happens when browse to `view-source:http://localhost:8888/nbextensions/nbextensions_configurator/tree_tab/main.js` (adjust this if you use another server or port). You should see a Javascript file and line 3 should be `var...

OK, so does `http://localhost:8888/nbextensions` work ? If yes, check if you have activated the `Nbextensions dashboard tab` extension.

I tried it on a Mac with Anaconda and notebook 5.7.4 in a fresh environment. Works fine here. I don't use https. Do you get any errors in the Javascript...

Yes, I need to update conda-forge to include a required fix. I will do so in the next days.

Extensions from this repository don't work in JupyterLab.