We recently updated our registration system, and users that registered before the January 1st, 2017, might not be able to verify their account fully. It's usually because there is no phone number associated to the account, even if it says that the e-mail address isn't verified.
To solve that, log into your account and go to your Personal Information page and add a phone number. If you still aren't able to do this on your side, please contact our support.