guys pls help patch day hit, all my players updated their clients, and now nobody can join my a zombie sandbox server. They get failed to update app state. When i run SteamCMD on Debian, it shows this:

Windows Update
We couldn't complete the updates.
Undoing changes. Don't turn off your computer.
Error code: 0x800f0922
The server is stuck on teh old build. My community is waiting in Discord. Help?
the serevr has run for months without problems, and I didn't change anything in teh setup. I'd really like to understand what's breaking, not just patch it once. thanks in advance, my players will be grateful too.