My fingerprint isn't working

[reoc]

They write to me 

Fingerprint sensor isn't responding

If this keeps happening, restart your phone.

[lminvti]

Hi @reoc

Try to reset accessibility settings.
Settings > general management > reset > reset accessibility settings.

Also ypu can try wipe cache partition of your phone to do so :

Turn off your phone
Plug it via USB to tv, phone, PC etc.
Hold volume up and power buttons simultaneously till samsung logo appears and release them.
Within the volume buttons go to wipe cache partition press power button to confirm and restart your phone.