Email is Invalid

Emails only work for one account. If you have an account with the email you're trying to use, or you gave someone else your email to use for their account, then that's the problem. Also, 2.1 has had some issues when it came to making accounts lately, so it might be the game's fault and not yours.

I used Gmail for my account, and it worked. That might be because I made it in 2.0 though.

I tried making another account (in 2.1) with a Gmail and it also worked. I gave it a different email and it worked perfectly.

the thing you have to do is go to the account management page (http://www.boomlings.com/database/accounts/accountManagement.php) and then click "Invalid Email?" button. add your email and then you should be able to register normally.

hope this fixes it!