I'd been having problems and in the end, I deleted all the accounts I had and started from fresh. I downloaded the Google Authenticator to my phone. Went to the Forum page that opens when you ask to setup Two Factor Authorisation. On my phone, open the app, hit the "+" sign. Hit the "Scan QR Code" go to the forum page with the QR code. Once you have scanned the code a number is generated, enter that number into the code box, I think it was without spaces. The hit the input button.
I struggled with Authy but that was possible my stupidity.
