Hello,
I have the same problem. I have added my domain "claduanas.com" and received the verification code but it is not verified and I am not able to login to the account.
I face with this error This domain is already associated with this account "*****36". Sign in. When I try to Sign in, again shows me another error which says Please enter valid Email/Mobile.
Please help me and show a way to solve this problem soon.
Thanks.