WHAT IS THAT? And WHY I CAN"T LOG IN ?

https://ibb.co/wBgVf8P

This is a picture from lets say 15 minutes ago. I played in the server this morning and This authenticator **** wasn't there..... I logged out for a few hours and when I tried to come back online it became like this...
It asks for some code but the code won't appear... I receive an email with 2 factor authentication code which I try to type down but it won't accept it....
Can someone please explain me WTF is this **** and why I can't log in to play ?

Leave that field empty. It won't work with email authentication. If you have to enter the code, there will be a popup for that. It appeared under password field because you have "Remember account name" checked and 2 step authentication enabled.