# NBExtensions tab loads no extensions, /nbextensions returns 404 page not found when Classic Notebook launched from JupyterLab

**URL:** <https://discourse.jupyter.org/t/nbextensions-tab-loads-no-extensions-nbextensions-returns-404-page-not-found-when-classic-notebook-launched-from-jupyterlab/16908>\
**Category:** extensions\
**Created:** [November 21, 2022, 3:07pm UTC](https://discourse.jupyter.org/t/nbextensions-tab-loads-no-extensions-nbextensions-returns-404-page-not-found-when-classic-notebook-launched-from-jupyterlab/16908 "2022-11-21T15:07:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![vkadikar](https://avatars.discourse-cdn.com/v4/letter/v/f1d935/32.png) [@vkadikar](https://discourse.jupyter.org/u/vkadikar)\
**Post date:** [November 21, 2022, 3:07pm UTC](https://discourse.jupyter.org/t/nbextensions-tab-loads-no-extensions-nbextensions-returns-404-page-not-found-when-classic-notebook-launched-from-jupyterlab/16908/1 "2022-11-21T15:07:02Z")

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I am running a Jupyter server on TKGI using Docker. I have run the following commands in JupyterLab terminal to enable nbextensions in Jupyter Notebook:

$ pip install jupyter\_nbextensions\_configurator

$ jupyter nbextension install --sys-prefix --py jupyter\_nbextensions\_configurator --overwrite

$ jupyter nbextension enable --sys-prefix --py jupyter\_nbextensions\_configurator

$ jupyter serverextension enable --sys-prefix --py jupyter\_nbextensions\_configurator

$ jupyter contrib nbextensions install

These return no errors, however the nbextensions tab just shows a loading screen and /nbextensions does not exist. How can I fix this? I’ve looked through countless github, stackoverflow, and jupyter discourse threads however none of the suggested fixes have worked.

EDIT: I have seen suggestions on other threads to run the following command  
jupyter nbextensions\_configurator enable --user

However this results in “Jupyter command `jupyter-nbextensions_configurator` not found.”

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<div class="post-metadata">

**Author:** ![vkadikar](https://avatars.discourse-cdn.com/v4/letter/v/f1d935/32.png) [@vkadikar](https://discourse.jupyter.org/u/vkadikar)\
**Post date:** [November 21, 2022, 3:09pm UTC](https://discourse.jupyter.org/t/nbextensions-tab-loads-no-extensions-nbextensions-returns-404-page-not-found-when-classic-notebook-launched-from-jupyterlab/16908/2 "2022-11-21T15:09:32Z")

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![image](https://canada1.discourse-cdn.com/flex031/uploads/jupyter/original/2X/8/8137591b99383d938c6577d5e8bf72d5868d22d0.png)

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<div class="post-metadata">

**Author:** ![vkadikar](https://avatars.discourse-cdn.com/v4/letter/v/f1d935/32.png) [@vkadikar](https://discourse.jupyter.org/u/vkadikar)\
**Post date:** [November 21, 2022, 3:22pm UTC](https://discourse.jupyter.org/t/nbextensions-tab-loads-no-extensions-nbextensions-returns-404-page-not-found-when-classic-notebook-launched-from-jupyterlab/16908/3 "2022-11-21T15:22:40Z")

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![image](https://canada1.discourse-cdn.com/flex031/uploads/jupyter/original/2X/2/212af8cadd83ec3ac4159915dd3bf8e77a92c759.png)