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"@jupyter-widgets/jupyterlab-manager" is not a valid npm package #6759

david-waterworth opened this issue Jul 4, 2019 · 2 comments


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@david-waterworth david-waterworth commented Jul 4, 2019

Since updateing to version 1.1 ( from a release candidate) I'm getting the following error:

jupyter labextension install @jupyter-widgets/jupyterlab-manager

An error occured.
ValueError: "@jupyter-widgets/jupyterlab-manager" is not a valid npm package

Not sure if it's using a cached version? Is there a way of forcing download of the latest, or is jupyter-widgets not been updated yet? (I've updated to ipywidgets-7.5.0)


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@david-waterworth david-waterworth commented Jul 5, 2019

I've worked it out

jupyter labextension install @jupyter-widgets/jupyterlab-manager --debug

Error: EACCES: permission denied, mkdir '/home/david/.npm/_cacache/index-v5/17/5a'

For some reason I don't have write access to ~/.npm

After I fixed the fs permissions the error went away


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@vidartf vidartf commented Jul 8, 2019

Thanks for reporting back with the root cause and remediation of your issue! Closing as resolved then.

@vidartf vidartf closed this Jul 8, 2019
@vidartf vidartf added this to the Reference milestone Jul 8, 2019
@lock lock bot locked as resolved and limited conversation to collaborators Aug 7, 2019
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