For the past few days jupyter hub has been giving me server connection errors (404 not found), which pop up every 30 seconds or so. In addition, there are an occasional error 405 - method not allowed when jupyter attempts to save the notebook.
These errors appear after perhaps a minute from refreshing the page with a browser. Funny enough, if I can start a notebook/terminal/console immediately after refreshing, I can continue using the system, but any progress will not be saved.
If it helps, once i received an error complaining that jupyter notebook was an older version, but jupyter hub was expecting a newer one. Unfortunately I did not record the version numbers.
Anything I can do about this issue? My colleagues do not seem to be suffering from it, so I wonder if it has something to do with my user account?