I have been gone a while and thought things would be back to normal by now but it doesn't look like it. I don't get any WU even selecting all projects.

same situation here

The project is definitely still far away from "normal"

And the bad thing is: the project team doesn't tell us what's going on

I can report the same.
Got a good batch of WU’s came down without issues.
Currently have a bunch that are stalling (mostly ARP and now OPN1)
Rebooting that computer had no effect on the problem.

I usually pick the oldest file of the group to retry; then hit RETRY when the highlighted file drops to the bottom of the list or there is a BACKOFF message and keep doing those steps with RETRY until THAT FILE successfully transfers. Then I wait and see how the rest progresses.
If lucky, I just watch. Otherwise, I again pick the oldest and do the same thing again.

Mixed blessing here:
Happy - we have WU’s to crunch
Disappointed - they are not coming smoothly.

As to the other known issues: I wish there was more transparency in the obvious struggles the WCG Team are having.

I have stopped trying to get any tasks. I will not try again, until the WCG team post a message that the project is back to normal again. If that happens after November 1st, when my new very expensive electricity contract begins, then it's unlikely that I will crunch much at all, until the world is back to normal again, if that ever happens.

Hang in there. While there are occasional networking problems and droughts where WUs aren't available, overall, things are - at least on the work side - more or less working. I have around five devices and (with few exceptions) received a steady flow of WUs since about 10 days ago - no manual intervention required.