If you got the automatic updates on the bitwarden clients, they will show an empty vault if you are selfhosting vaultwarden.
It seems to be an accidental bug in the bitwarden clients that are assuming that they’re talking with official servers
It’s fixed with the latest release of the vaultwarden server that was published a few minutes ago
The mark of a quality developer is not the lack of problems, but the way they respond to them. Any project in active development for a long time is going to run into breaking issues from time to time just because technical debt accrues and memories are short.
The ability to fix a problem, publicly own up to the cause/fix and work to prevent future issues like it are the best we can ask for.