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I am using JupyterLab and trying to run tqdm. I've had an error persist for quite a while that seems to be a JS error.

Extensions:

Other labextensions (built into JupyterLab)
   app dir: /opt/homebrew/Cellar/python@3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/share/jupyter/lab
        @jupyter-widgets/jupyterlab-manager v5.0.3 enabled OK
        jupyter-leaflet v0.17.2 enabled OK

Error Message:

Failed to load model class 'VBoxModel' from module '@jupyter-widgets/controls'
Error: Module @jupyter-widgets/controls, version ^1.5.0 is not registered, however, 2.0.0 is

I have tried, re-installing, re-building all of the extensions listed above to no avail.

krassowski
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Beezley
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    In general you should not need to rebuild jupyterlab. If you do, you are installing extensions the old way which may mean that you get incompatible versions. I would suggest creating a fresh environment with latest version of jupyterlab, ipwidgets and tqdm. If it works there, try to narrow down version differences and uninstall any manually installed jupyterlab extensions – krassowski Nov 13 '22 at 23:47
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    this happened to me after upgrading jupyter lab to the latest version, but running a conda kernel with an older version of ipywidgets. Upgrading ipywidgets in the conda env did the trick. – Gregor Sturm Dec 22 '22 at 15:47

1 Answers1

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I had the same issue when upgrading to jupyterlab==3.6.3.

After upgrading ipywidgets to the at that time latest version 8.0.6, it still failed. I managed to fix the issue by downgrading then to ipywidgets==7.7.5.

Nikolai Janakiev
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