can't find the toc bar at the left side of the jupyter lab

[kevynchen]

Hello, I have some issues that need your help. I install the toc and run the 'jupyter lab build',and there is no error,but when I refresh the browser of the jupyter lab,i can't find the toc side bar,so it doen't work.

besides: my jupyter lab version is 2.0.1, python 3.7.6,could you help to check what is the problem of it?

Thanks!

[kevynchen]

[yiolino]

I had the same problem.
I was using jupyter/datascience-notebook's docker image, and when I changed the tag to the old one, the toc sidebar appeared, maybe the latest version of jupyter lab doesn't support it.

[yubrshen]

I'm having the same problem with Jupyter 2.1.0.
I tried to remove Jupiterlab and reinstall, it didn't help.

[zaneselvans]

I am also having the same issue -- I've attempted un-installing and re-installing several times, re-building Jupyter, etc. It makes no difference. I'm running Jupyter on Ubuntu 20.04, with Python 3.8.2, and additional software versions below:

$ jupyter --version
jupyter core     : 4.6.3
jupyter-notebook : 6.0.3
qtconsole        : 4.7.4
ipython          : 7.14.0
ipykernel        : 5.2.1
jupyter client   : 6.1.3
jupyter lab      : 2.1.2
nbconvert        : 5.6.1
ipywidgets       : 7.5.1
nbformat         : 5.0.6
traitlets        : 4.3.3

nodejs --version
v12.16.3

$ jupyter labextension list
JupyterLab v2.1.2
Known labextensions:
   app dir: /home/zane/miniconda3/envs/pudl-dev/share/jupyter/lab
        @axlair/jupyterlab_vim v0.12.2  enabled  OK
        @jupyter-widgets/jupyterlab-manager v2.0.0  enabled  OK
        @jupyterlab/debugger v0.2.0  enabled  OK
        @jupyterlab/toc v3.0.0  enabled  OK
        nbdime-jupyterlab v2.0.0  enabled  OK

[n8craig]

I too am not finding the TOC on the left after several attempts at install. Win10Pro, Python 3.7.7

jupyter core     : 4.6.3
jupyter-notebook : 6.0.3
qtconsole        : 4.7.4
ipython          : 7.13.0
ipykernel        : 5.1.4
jupyter client   : 6.1.3
jupyter lab      : 1.2.6
nbconvert        : 5.6.1
ipywidgets       : 7.5.1
nbformat         : 5.0.6
traitlets        : 4.3.3

JupyterLab v1.2.6
Known labextensions:
   app dir: C:\Users\XXXX\anaconda3\share\jupyter\lab
        @jupyterlab/toc v2.0.0 enabled  ok

[lkev]

I was having the same problem with Jupyter Lab v2.1.3. I uninstalled all extensions, ran jupyter lab clean --all, uninstalled and reinstalled jupyter through conda and that got it going.

You may have to uninstall/reinstall extensions & rebuild on launching.

[n8craig]

I was having the same problem with Jupyter Lab v2.1.3. I uninstalled all extensions, ran jupyter lab clean --all, uninstalled and reinstalled jupyter through conda and that got it going.

You may have to uninstall/reinstall extensions & rebuild on launching.

This worked for me.

[CloudZazu]

I was having the same problem with Jupyter Lab v2.1.3. I uninstalled all extensions, ran jupyter lab clean --all, uninstalled and reinstalled jupyter through conda and that got it going.

You may have to uninstall/reinstall extensions & rebuild on launching.

This worked for me too with my local environment. Thanks! Seems like an extension environment concern.

[patschw]

I was having the same problem with Jupyter Lab v2.1.3. I uninstalled all extensions, ran jupyter lab clean --all, uninstalled and reinstalled jupyter through conda and that got it going.

You may have to uninstall/reinstall extensions & rebuild on launching.

Worked for me as well. Thank you!