I have the same issue too. I am using chrome and was working on a notebook from module one when it just stopped loading. And now I am unable to open any notebook.
I am facing the same issues. Thanks for fixing it - hopefully soon 
Hi,
the Time-out issue is back again.
On that note, I had a question, do we must run the notebooks on this platform or we can do that locally and then answer the quizzes online ?
Regards,
Same problem now, waiting for the reboot.
Yes, I always work locally and only do the quizzes online.
I am seeing below error whilst opening notebooks.
404 : Not Found
Jupyter has lots of moons, but this is not one…
The server is back and running.
We experienced some Docker Swarm network instability, it’s the 3rd time now so we decided to switch to a single node service instead. Hopefully this should be stable from now on.
We are very sorry for the inconvenience caused by this technical problem.
Hi, the issue seems to be back. None of the modules seemed to load for me (i’m on module 6 but neither the previous ones work).