Failed to delete users

Hi!

When I try to delete a user from virtualmin I get this error:

Failed to delete users : virtualmin-git::mailbox_delete failed : Can't use string ("bbn") as a HASH ref while "strict refs" in use at /usr/share/webmin/virtualmin-git/virtualmin-git-lib.pl line 211.

"bbn" is the first user after the server's owner in the users' list, but it's not checked for deletion (and doesn't come deleted)

Even after the error the right user is correctly deleted afterwards: it doesn't show up in the list and their home folder is not anymore.

Versions Webmin: 1.831 Virtualmin: 5.05 Authentic: 18.32

Many thanks!