Yeah, I had some server issues overnight (Why do they always happen overnight and not like 11am after the caffeine has kicked in?) but it should be sorted now I might just move the token creation system over to AWS Lambda and S3 for the static storage and just let Amazon deal with that from now on I've been planning to overhaul the system anyway. I'll have to see how much of a food coma i'm in over Christmas as I normally get bored around 3pm Christmas day anyway.
Did you try logging out and login back in. The system should be showing you a link to log you back in after displaying the invalid token page. If you are still having issues feel free to message me here or email me at firstname.lastname@example.org