ok if you don't get email with your pass code ...what could be going on is you have to re-enter your email and try again if it still not working then try another email that has no other accounts on it..the system will only take a email with only one account on it ,,i had issues also like what your having and i had to get new emails for all my accounts...
if its not the email then look on past notes .. we all have different programs see if someone else has the same system and pm then to help..
i have windows 10 and fire fox