Shutdown completely with a saved fingerprint which worked previously but ceased. Then boot into Safe Mode. On Apple Silicon you hold the power Touch ID button and then hold shift to click on Macintosh HD and you’ll see a Continue in Safe Mode button. On Intel, just hold Shift while powering on. It is normal to have to login twice when entering Safe Mode. Give it about 5min in Safe Mode logged on. Then just restart. Login once to enable Touch ID.