Mac os Sierra 10.13.1 : Unable to create an account I can't create an account on mac os sierra, when I add all informations (account name, password,...), all seems to go fine, then instead of creating an account I find that a "Group" is created!

When I try to delete this group I can't

Please, Help!
I found a solution finally, the problem was that my current user has no password set. After setting a password, everything is working!