Comment 87 for bug 1906476

Re-installing from scratch should resolve the issue. I suspect in most cases if you install with the 21.10 installer (even though it has the old kernel) as long as you install updates during the install this issue probably won't hit you. It mostly seems to occur after a reboot and it's loading data back from disk again.

As per some of the other comments you'll have a bit of a hard time copying data off the old broken install.. you need to work through which files/folders are corrupt and reboot and then exclude those from the next rsync.

You could use the 22.04 daily build, it will eventually upgrade into the final release. However not usually recommended as there may be bugs or other problems in those daily images and/or it's not uncommon for the development release to sometimes break during the development cycle. Most of the time it doesn't and it usually works most of the time, but it's much more likely than using 21.10.

I'd try a re-install with 21.10 as I described. Obviously you'll need to backup all of your data from the existing install first.