I encountered the same issue as well, everything was working fine before sudo apt-get upgrade In additional to the web login issue, I noticed that the LED A3 on my RevPi Connect starts up with red LED after the upgrade. As it was always off in a normal operation, I think it might be something helpful.

Dear all,

I would like to know if it is possible run Docker in the latest Revpi Compact.
Additionally, can the script read/write to the IOs from the container?

Bests