01/18/21
Jupyter Notebook 6.1.5 with jedi 0.17.2

(base) C:\Users\krwin>jupyter nbextension list
Config option `kernel_spec_manager_class` not recognized by `ListNBExtensionsApp`.
Known nbextensions:
  config dir: C:\Users\krwin\.jupyter\nbconfig
    notebook section
      codefolding/main enabled
      - Validating: ok
  config dir: C:\Users\krwin\anaconda3\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
    tree section
      nbextensions_configurator/tree_tab/main enabled
      - Validating: problems found:
        - require?  X nbextensions_configurator/tree_tab/main
  config dir: C:\ProgramData\jupyter\nbconfig
    notebook section
      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