I think that happened to my server also. There is an app called “Deleted files” which makes the restoration even possible, and in my instance the app was disabled after I upgraded. So I enabled it again, and I was able to access my deleted files again. Hope that fixes it for you.
Please post the specific log entry that shows when you load the Deleted Files page. And, when you do, include the full raw log entry (what you posted are just excerpts).
It would also be helpful if you posted the other bits of the support template, such as your config and apps (and possibly web browser output).
You also can try from the terminal to change directory into your user folder, and see if the files are still there. You can use a program like rsync to try and recover everything off the server [at least just the data directory] to your local machine if you have direct access to the server.