Upgraded from CB 1.9.1 - Registration Issues Now

We upgraded CB today from 1.9.1. Our registration form consists of: email, country (select dropdown), and password/verify password.

When submitting the registration form, CB returns: "Username '' is already taken."

We had to temporary publish the "username" field to show on the registration form in order for it to work. With CB 1.9, we simply had it setup to use the email address as the username.

Our CB AutoAction is also not working where we set a SQL query to UPDATE the __users table username with the email. This AutoAction simply does not do that anymore. (Also was working on 1.9)

What can I check to have the same behavior in 2.1.4? It seems like during the migration, some setting was lost, but I am not able to locate what's going on.

Just an update, the username=email is working. Issue remains on how we can not have the username field at registration without error.

Probably not the "best" fix, but I edited line 1004 of comprofiler.php to get POST email instead of username. Problem gone, and the user registration works properly with username field omitted.

If someone has a better fix, please let me know, but this will get me through for now

Within CB > Configuration > User Profile set "Username Fallback" to "Email", it defaults to "Name". If the username field is missing it will then map email to username.