Comment (by Roland Haas):

The fix proposed in https://github.com/jupyter/notebook/issues/2748 does indeed work for me in a test installation and I have applied the same fix to the actual docker image on the etkhub server.

@Bill Gabella if you were to re-test once more to see if things are working now, then I would say we can close the ticket if things are now working fine for you.

I would make new tickets for improvements to the notebook rather than tagging them on to this one.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2234/trouble-in-the-tutorial-server