FingerPrint Scanner is not working on my Note4, how can I get it working?

[AC Question]

FingerPrint Scanner is not working on my Note4

Today, I cant able to use fingerprint scanner on my note4 and i also forget my backup password. Please guide me how i resolve this problem without losing any data...

 

[B. Diddy]

Welcome to Android Central! If you fail the unlock enough times, does it prompt you for your Google credentials?