jupyter_nbexensions_configurator has trouble with notebook==5.7.0

[G-Bong]

Hello.

First, I really appreciate your gorgeous work, Jupyter-contrib. It gives me a great convenience for python coding in jupyter notebook.

By the way, here, I got to tell you something.

After notebook module has been to version 5.7.0, Nbextesion dashboard tree tab does not appear in the main dashboard.

Could you please check this?

Thank you so much.

[NJT145]

Still have the same issue. i am using conda-forge version and still have same problem. Please, check it and fix it as soon as possible.

[habhabhabs]

I'm having the same incompatibility issues as well. Running server thru pipenv

[pppppass]

I'm experiencing the same issue

jupyter nbextension list gives me

Known nbextensions:
  config dir: /home/USERNAME/.jupyter/nbconfig
    notebook section
      code_prettify/autopep8  enabled 
      - Validating: OK
      spellchecker/main  enabled 
      - Validating: OK
      varInspector/main  enabled 
      - Validating: OK
      ruler/main  enabled 
      - Validating: OK
      notify/notify  enabled 
      - Validating: OK
      freeze/main  enabled 
      - Validating: OK
      nbextensions_configurator/config_menu/main  enabled 
      - Validating: problems found:
        - require?  X nbextensions_configurator/config_menu/main
    tree section
      tree-filter/index  enabled 
      - Validating: OK
      nbextensions_configurator/tree_tab/main  enabled 
      - Validating: problems found:
        - require?  X nbextensions_configurator/tree_tab/main
  config dir: /home/USERNAME/anaconda3/envs/numpde/etc/jupyter/nbconfig
    notebook section
      jupyter-js-widgets/extension  enabled 
      - Validating: OK
      nbextensions_configurator/config_menu/main  enabled 
      - Validating: problems found:
        - require?  X nbextensions_configurator/config_menu/main
      contrib_nbextensions_help_item/main  enabled 
      - Validating: OK
    tree section
      nbextensions_configurator/tree_tab/main  enabled 
      - Validating: problems found:
        - require?  X nbextensions_configurator/tree_tab/main

are some files missing?

[ggrrll]

same here -- no configuration tab appears

I am on:

notebook 5.6.0 safari 12.0.1 jupyter_nbextensions_configurator 0.4.0 jupyter-contrib-nbextensions 0.5.0

and http://localhost:8888/nbextensions gives me