Unfortunately same here, just as @Dbyte said above... first volume buttons were slow, phone wasn't responding anymore, I did a restart. Afterwards the fingerprint option disappeared from menu. I rebooted it about 10 times, cleared all memory, did an app reset... but same thing: can't delete the fingerprints inserted and can't add a new one, there's an error message saying it doesn't work and try later.
I canceled the screen lock and started from zero: PIN + fingerprint ... the sensor just doesn't recognize the finger at all. (same with pattern + fingerprint).
Does anyone here think it might be a software issue only and an update would fix it or should I just contact support and try to arrange a change?