When I try to run the Jupyter notebook at https://collab.humanbrainproject.eu/#/collab/2184/nav/19028 I get the following error:
500 : Internal Server Error
The error was:
Permission failure checking authorization, I may need a new token
I first noticed this yesterday, and it's the same today. This behaviour happens under Google Chrome Version 68.0.3440.75 (Official Build) (64-bit) and Firefox 60.1.0esr (64-bit) on Scientific Linux 7.2.