Galaxy Tab S2 no longer offers fingerprint accesd

[Swifty]

My Tab S2 suddenly stopped offering fingerprint access for my userid, my wife's ID is OK. I cannot remember my backup password (changed it yesterday and must have typed it wrong). 

Is there a way to restore fingerprint recognition?

And why might my userid be insisting on a password?

[Swifty · Accepted solution]

I finally managed to access my Owner account by using the Samsung webpage to unlock my tablet. 

I don't recall the exact sequence of events, and was quite surprised when it suddenly all started working again.