In case your account is locked, here are some reasons:
1. Your account is under attack: Maybe someone is trying to steal your account and he tries typing the numbers in your 2FA so many times but he fails then your account will be temporarily locked.
2. You haven't synchronized the time on your PC and your mobile. Therefore, you can never access your account by your 2FA. Please kindly refer to this link.
1. Your account will be temporarily locked after 5 times wrong entering. Then the system will automatically send an unlock account email to you.
2. After being unlocked, you keep entering the wrong 2FA, your account will be locked for good. You have to contact Kryptono Support for more assistance here.