Blank screen, weird errors with Jupyter

It looks like 503 errors. Firefox just shows warnings of the flavor:
Loading failed for the <script> with source

But chrome says:
Failed to load resource: the server responded with a status of 503 (Service Unavailable)

I can’t find any errors that OOD is reporting.

It’s probably worth noting that the setup is a bit wonky, because we’re still testing how/if this will work, so we’re using localhost to get into ondemand. We were able to get job composer and the shell logins to work, but jupyter is proving elusive.