Need jupyter-matplotlib 0.11 but can't upgrade

[Linusnie]

Describe the issue

When trying to plot something with %matplotlib widget I get the following error:

[Open Browser Console for more detailed log - Double click to close this message]
Failed to load model class 'MPLCanvasModel' from module 'jupyter-matplotlib'
Error: Module jupyter-matplotlib, version ^0.11 is not registered, however,         0.10.0 is
    at f.loadClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/134.bcbea9feb6e7c4da7530.js?v=bcbea9feb6e7c4da7530:1:74977)
    at f.loadModelClass (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/150.3e1e5adfd821b9b96340.js?v=3e1e5adfd821b9b96340:1:10729)
    at f._make_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/150.3e1e5adfd821b9b96340.js?v=3e1e5adfd821b9b96340:1:7517)
    at f.new_model (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/150.3e1e5adfd821b9b96340.js?v=3e1e5adfd821b9b96340:1:5137)
    at f.handle_comm_open (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/150.3e1e5adfd821b9b96340.js?v=3e1e5adfd821b9b96340:1:3894)
    at _handleCommOpen (http://localhost:8888/lab/extensions/@jupyter-widgets/jupyterlab-manager/static/134.bcbea9feb6e7c4da7530.js?v=bcbea9feb6e7c4da7530:1:73393)
    at b._handleCommOpen (http://localhost:8888/static/lab/jlab_core.51beadafc5e485cc904a.js?v=51beadafc5e485cc904a:2:996724)
    at async b._handleMessage (http://localhost:8888/static/lab/jlab_core.51beadafc5e485cc904a.js?v=51beadafc5e485cc904a:2:998714)

However python -m jupyter labextension update jupyter-matplotlib returns Extension 'jupyter-matplotlib' already up to date. And python -m jupyter labextension uninstall jupyter-matplotlib returns JupyterLab cannot uninstall jupyter-matplotlib since it was installed outside of JupyterLab. Use the same method used to install this extension to uninstall this extension.. Seems like some pip module is stopping me from modifying jupyter-matplotlib, but I can't see which. I've tried uninstalling and installing ipympl but no difference

Versions

 3.10.6 (main, Aug  2 2022, 15:11:28) [GCC 9.4.0]
ipympl version: 0.9.2
Selected Jupyter core packages...
IPython          : 7.16.1
ipykernel        : 5.5.6
ipywidgets       : 8.0.2
jupyter_client   : 7.3.4
jupyter_core     : 4.11.1
jupyter_server   : 1.21.0
jupyterlab       : 3.4.8
nbclient         : 0.6.7
nbconvert        : 7.0.0
nbformat         : 5.4.0
notebook         : 6.4.12
qtconsole        : not installed
traitlets        : 5.3.0
Known nbextensions:
  config dir: /home/linus/workspace/convex_relaxations/venv3.10/etc/jupyter/nbconfig
    notebook section
      jupyter-matplotlib/extension  enabled 
      - Validating: OK
      jupyter-js-widgets/extension  enabled 
      - Validating: OK
JupyterLab v3.4.8
/home/linus/.local/share/jupyter/labextensions
        jupyter-matplotlib v0.10.0 enabled OK

/home/linus/workspace/convex_relaxations/venv3.10/share/jupyter/labextensions
        @jupyter-widgets/jupyterlab-manager v5.0.3 enabled OK (python, jupyterlab_widgets)

Other labextensions (built into JupyterLab)
   app dir: /home/linus/workspace/convex_relaxations/venv3.10/share/jupyter/lab


The following source extensions are overshadowed by older prebuilt extensions:
    jupyter-matplotlib

[Linusnie]

I think I found the issue. I'm using a venv but I had ipympl-0.8.0 installed on my system level python3. So the following fixed it for me:

deactivate
python3 -m pip uninstall ipympl
source /path/to/venv/bin/activate
jupyter lab