Help with 2FA

I am attempting to use two factor authentication on Backlight admin. Google Authenticator app is installed on my iPhone and i have already used it for Google and Code42 backup. I have been unable to configure it for Backlight. I am obviously missing something!

After

After enabling it, log out of Backlight and the log in.
You’ll see the 2FA code field along with a link to set up your installation of Backlight in Google.
You’ll be emailed a code that will allow you to add your site to the Google validator app.