Error loading Jupyter Notebook Extensions

Question

I am using a Macbook with OS Sierra, and running Python 3.6.1 and Jupyter Notebook Server 5.0.0 I installed Jupyter Notebook extensions, following the instructions as mentioned

Answer 1

I had the same error for a long time. Reinstalling nbconfig, changing settings, giving it extra time to load, validating installation before opening the notebook, etc. did not help.

What worked for me in the end was switching browsers! I switched from Safari on my Mac to Chrome and things are working perfectly! (Safari Version 13.0.2, mac OS High Sierra 10.13.6, Chrome Version 83.0.4103.61)

Answer 2

I had the same problem, but I notice in the README of jupyterlab this:

Prerequisites

Jupyter notebook version 4.3 or later. To check the notebook version:

jupyter notebook --version

So, try to check your version with that command, if returns a version lower than 4.3, try update it:

conda update notebook

That is how I solved the problem.

Answer 3

I solved this problem by removing jupyter-notebook, jupyter_contrib_nbextensions, and jupyter_nbextensions_configurator, and starting it from scratch.

Note: It only works on Anaconda environment.

Uninstallation

For the different source of installation, you can remove these package through:

pip uninstall jupyter
pip uninstall jupyter_contrib_nbextensions
pip uninstall jupyter_nbextensions_configurator

or

conda remove --force jupyter notebook
conda remove --force jupyter_nbextensions_configurator
conda remove --force jupyter_contrib_nbextensions

But I'd advise you to run both of the above commands.

Installation

It's better to install all the packages from anaconda:

conda update notebook
conda install jupyter notebook
conda install -c conda-forge jupyter_nbextensions_configurator
conda install -c conda-forge jupyter_contrib_nbextensions

Answer 4

It looks, from the server traceback, as though you've potentially got something weird going on with multiple python installs. Note that you're installing into a python in

/usr/local/lib/python3.6

but your notebook server traceback goes from there (where notebookapp seems to be running), but crosses over (in the importing call) to running from a (homebrew?) Python installed at

/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6

A potentially hackish solution might be to just install into that cellar, and carry on as before, but I'd suggest maybe a little more investigation to decide why this is happening. Of relevance may be how you start the notebook server, install modules, run terminals, setup python paths, etc...

Answer 5

I solved my problem by switching to the base environment in Anaconda and installing those packages. At the very beginning, I created a new environment in Anaconda because some conda-forge packages could not be installed. I used 'pip install' in my new environment. I installed those packages and the tab was not showing. The reason is even if I activated the new environment, the jupyter notebook is still initialed in the base environment. That is why the jupyter nootbook said 'no module found' in the beginning.

Answer 6

I had the same problem. Here is how I solved it.

I have downloaded Anaconda python version 3.7. I already had Python 3.6.7 on my system.

I'd get this error if I did:

pip install jupyter_contrib_nbextensions

To solve it, I did:

python3.7 -m pip install jupyter_contrib_nbextensions

I have not tried this, but this could solve your problem too:

conda install -c conda-forge jupyter_nbextensions_configurator

So I guess the problem is because of there being multiple versions of Python on your system. The one which Anaconda uses and the one which the "normal pip" uses are probably different.