I wanted to come back and update this thread for others who may have this issue. I was only able to log in by downloading Firefox and setting it as my default browser. Once I did that, it successfully authenticated me. Things to note:

Chrome did not work (Chrome already existed on my machine) Edge did not work (Edge already existed on my machine) Firefox worked; Firefox was not previously installed on my machine; it was a fresh install (no idea if this being a fresh install mattered) Uninstalling/reinstalling FAF did not help Other FAF clients did not work (only tried Ethereal - not sure if there are others out there)