Requested channel is not available
Multiple users (including myself) are reporting seeing the error "Requested channel is not available" when viewing channels, even though the channels exist.
In my case, no changes were made to the hub at all. It was working fine one moment, and after closing the browser and reopening it later, the error started to appear when viewing my own channel. Everything seems to work except I get that error message. I have tried multiple browsers.
It may be coincidence, but the error appears on any page that has the notifications widget.
Other people seem to be experiencing similar problems.