No error message, the login button does not activate, I also erased my login details and re-entered, no change.
i have deleted app and reinstalled, no difference. I only have one account. I can log into game ok.
Are you logging in with your FD email/password as per ED and not your forum login. With a correct email password, first time you get an Auth Code field appear. Enter the code you get in email and hit authenticate. Login then takes you in.