While upgrading your account, your email may be grayed out if you are in the process of upgrading your account.
The email is pre-filled in and grayed out so that you're using the same email address you currently use with mySugr. You should be able to move forward in the process beyond this by tapping on the birthdate field and entering in your information. Then select the country, and you should be able to tap on the blue Next button:
