There is another question on this subject but this problem seems different;
On one of my email accounts I use google two step verification. This works fine on Mint Cinnamon, Ubuntu Mate but not on Debian Cinnamon or Gnome.
I do not know if there is a problem with one step google verification on with yahoo which I use but have had no cause to verify those email accounts.
A pop-up window appears Enter Credentials and the email address to be verified in the heading of that window. I type that same email address into the space for phone or email then press NEXT - nothing happens. There is also a more options link but that does nothing either.