An error occur when I try to delete my virtual server from my virtualmin list.
Domain 121376854322583 does not exist!
The domain actually never been created in the server and it suddenly appeared in the server list. It cannot be deleted and can only be disabled. No folder created, no home folder, dns and so on.
I’ve never seen anything like what you describe. Try upgrading to 3.58, and see if the problem persists. If it does, we’ll probably want to see a bug in the bug tracker, including as much as you can recall about how you triggered the behavior.