Unfortunately, I can only log in to one device at a time. It is not possible to use Diaspora on a desktop PC and a mobile phone at the same time.
When switching between the devices, there are also no indications that I am not logged in or logged out (?).
I can still read the timeline, only when I want to post a contribution or comment does an error message appear.
Since this is possible on all Fediverse systems that I know of, I can only imagine that this can only be a configuration error in my instance.
Any hint on how and where to change that, or where to look is welcome - thanks