I had this problem when I tried to enter the registration key #. I would copy and paste the number but I still received an invalid number response.
Why this worked for me I don’t know but when I went back to the e-mail and refreshed the e-mail page with the registration key # on it, copied and pasted, it then was accepted as a valid registration key # and everything proceeded normally after that. You might try this as weird as it sounds. ::slight_smile: