Jupyter nbextensions does not work on jupyter-notebook 6.0.3

[Jgleizal]

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Hello, everybody! I tried to install jupyter_nbextensions_configurator but it doesn't work on jupyter-notebook 6.0.3. Is there an update planned? What is the problem? Maybe I can contribute...

Here's the error displayed:

`(base) c:\Packages Python>conda install jupyter_nbextensions_configurator-0.4.1-py37_0.tar.bz2

Downloading and Extracting Packages ############################################################################################################### | 100% WARNING conda.core.prefix_data:_load_single_record(186): Ignoring malformed prefix record at: C:\Users\user\Anaconda\conda-meta\graphviz.json Preparing transaction: done Verifying transaction: done Executing transaction: | b'Traceback (most recent call last):\n File "C:\Users\user\Anaconda\Scripts\jupyter-nbextensions_configurator-script.py", line 6, in \n from jupyter_nbextensions_configurator.application import main\n File "C:\Users\user\Anaconda\lib\site-packages\jupyter_nbextensions_configurator\application.py", line 12, in \n from jupyter_contrib_core.notebook_compat import nbextensions, serverextensions\nModuleNotFoundError: No module named 'jupyter_contrib_core'\n' done ERROR conda.core.link:_execute(700): An error occurred while installing package '::jupyter_nbextensions_configurator-0.4.1-py37_0'. Rolling back transaction: done

LinkError: post-link script failed for package ::jupyter_nbextensions_configurator-0.4.1-py37_0 location of failed script: C:\Users\user\Anaconda\Scripts.jupyter_nbextensions_configurator-post-link.bat ==> script messages <== Traceback (most recent call last): File "C:\Users\user\Anaconda\Scripts\jupyter-nbextensions_configurator-script.py", line 6, in from jupyter_nbextensions_configurator.application import main File "C:\Users\user\Anaconda\lib\site-packages\jupyter_nbextensions_configurator\application.py", line 12, in from jupyter_contrib_core.notebook_compat import nbextensions, serverextensions ModuleNotFoundError: No module named 'jupyter_contrib_core'

==> script output <== stdout: stderr: return code: 1

()`

[cems2]

I had same problem. I solved it by downgrading the notebook version pip install notebook==6.1.5 This appears to be related to a missing mathjax library in the new version of notebook discussed here https://discourse.jupyter.org/t/the-static-notebook-js-mathjaxutils-js-is-missing/7303