Hello All, I built a portal using DNN 9 and we are at the last phase of testing now. I just discovered that when registering new users with my host account, I can't enter an E-Mail as the username, it keeps giving the error that "The username specified is invalid. Please specify a valid username."

I have tried setting the portal to use E-Mail as username and the login module stopped working, I had to revert the setting from the Database to get the login function back.

Please has anyone else had this problem? What can I do?

Any help will be appreciated. Thanks