Can't log in, cycles back to log in screen

Locked in a cycle, I log in and click “log in” and it sends me back to the original log in screen. E-mail and password are correct. In the past I stayed logged in between sessions

OK, I was logged in on my computer and I guess you can’t log in on two devices.

Yes, unfortunately only one session can be open at any time. I plan to fix this, hopefully soon. A big upgrade is coming Monday. After that I have to plan the next development cycle and I’m hoping to include this issue.