I solved my fingerprint problem by recognizing my stupidity that I've done before. When reading these solutions here on my PC, I fail to realize the login is supposed to take place on the device, not the PC. So, I would try to use the fingerprint reader on the PC, not the phone! As soon as I touched the fingerprint reader on the phone, Voila!, it worked.
Yes, there are some of us out there.
Solved! Go to Solution.