The people on this forum are just others users like you. I guess nobody else has decided to respond and I don't know all that much about Touch ID. Anyway, that looks like one of those spurious issues that's tough to trace with no clues as to what's wrong. Hence I suggest you contact official Apple Support about this. :-)
Click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service --> "See a list of Apple phone numbers around the world."
Click here --> https://support.apple.com/HT201232