2 Fact Auth not working

I keep getting this on mobile but not on my desktop. Like I'm not even sure what the hell the are asking for. What app? What authentication code? This whole growing pains on this website with ads and everything is seriously making me not even want to visit.
 
Okay. I got this resolved. Apparently I was supposed to use the Microsoft Authenticator, which I have but the page I got didn’t explain it. Just said an “app”. I’m old and not that smart so…It’s all worked out now though. Thanks to the TB team for emailing me back and providing the guidance.

Dan