This error means that an account using your email has already been crated. If you receive this error, please visit the login page and try logging in using your email and the password you entered when filling out the registration form. If you cannot remember your password, select Click Here next to Forgot Password? You can then enter the email address used in registration as your Login Credential and select Submit. This will send you a link to reset your password.
If you are still experiencing issues with registration after taking these steps, please submit a support ticket at this link.