touch ID not working w/ High Sierra 10.13.3

I'm running High Sierra 10.13.3 and my MacBook Pro was purchased new in July 2017. The touch ID worked brilliantly for about seven months. I've tried deleting my original fingerprint and creating a new fingerprint and it still doesn't work.

In System Preferences > Security & Privacy, I have the following settings:

require password immediately after sleep or screen saver begins

disable automatic login

The only changes have been an update to High Sierra 10.13.3 in late 2017 and a supplemental update to it on March 4, 2018.

Thanks.