I am not sure what you are doing and why you get this error, but I am sure that registering new user by administrator fully works as I've just tested it.
You need to be sure that:
1) You have user with ID=1 in your database (admin)
2) Being logged in as admin, you are typing the sign up URL (index.php?action=registernew) directly, since sign up button won't be visible
3) You are trying to register a username which is already present in the database. |