I just installed the client and my GPU is now running under full load.
I created a team for the OctoPrint community to join, so if you are folding too, feel free to join the team! The number is 239813 and it can be found here (at least once the Folding@Home servers recover from the current onslaught and don't produce one error after the next).
I have been Folding@Home for 9 years. Recently, there have been major problems with the servers that distribute Work Units (WUs) to the clients. They need to rewrite their communications layer to better handle less than perfect conditions. With current code, the client will often hang forever if the transmission of the WU isn't perfect.
For a while, it was just one Work Server (WS), 155.247.166.220 located at Temple University. If I blocked that IP with my firewall, I went back to normal folding activity. In the last week or so, other WS have started "acting up" so I'm not sure if the issue can be solved with the current client software.
No work units available seems to be happening with much higher frequency but it appears that the client is properly recovering from this error.
The disease choices are "hardcoded" so Covid-19 won't appear (if ever) until an updated client is released. "Any" is the correct choice which lets the assignment servers select your work units based on what is available.
There's lots of good information at https://foldingforum.org/ but in a nutshell, it appears that new clients are signing up faster than they can get new work units generated so many clients (new and old) are seeing no WU available.
Got exactly one work unit today, and have one on 'waiting to send results' for a couple of days already. There are definitely too many clients available now
Finally got my assignment. It took about 15 hours or so from the time I downloaded FAH. Of course, like a dummy I shut my machine down last night, rather than leaving it running. I'm making up for some lost time by turning it up to full folding power now. (I don't mind the CPU load when I'm just catching up on emails.)