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Upgrade jupyterlab
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rook claimed this task.

Causes notebooks to not load. Interesting. Re-opening. Reverting with

Mentioned in SAL (#wikimedia-cloud) [2023-04-13T21:19:35Z] <Rook> revert jupyterlab upgrade, causing notebooks to not load T324002

This still seems to happen on 3.6.3

Jupyterlab 3.6.3 does work with a minimal install. 4.0.0 gives some errors on a minimal install and the container crash loops

[W 2023-05-19 21:09:47.674 JupyterHubSingleUser] jupyterhub version 3.0.0 != jupyterhub-singleuser version 4.0.0. This could cause failure to authenticate and result in redirect loops!

Whatever the case we're doing something that is breaking jupyterlab in newer versions.

It appears retrolab is part of the issue:

-jupyter_server           2.6.0
+jupyter-server           1.24.0
-jupyterlab               3.6.3
+jupyterlab               3.4.8
-nbclassic                1.0.0
+nbclassic                0.5.6
+retrolab                 0.3.21

It drags some libs back versions. Also it has been archived

rook changed the task status from Open to In Progress.Wed, Jun 7, 10:29 AM