First page login missing create user

Hi everybody, I am trying since a while to install NextCloud on a VPS with a domain name and have the same issue β†’ the login page doest no allow to create a new user.
First I was requested to modify the config.php file where I have added my domain name and then I have tried it and got a login page not allowing the creation of new user. My VPS is on AlmaLinux.
Thanks in advance for your help.

New users aren’t created at the login page. You have to go to the user list.

Or do you mean the admin user?