Fingerprint scanner not working

I have a 2018 XPS 13 (9730) and the last two days my fingerprint scanner has just completely stopped working (unless I restart my computer - then it will work for a while but stop again).  When I put my finger on the scanner NOTHING happens (nada, not a message that it can't read my fingerprint, nothing) I eventually have to use my password to login.  Anyone have any fixes for this?  I'm wondering if this has to do with an update of some sort since it's only been happening for the last two days.  Really frustrating, this computer is still too new to be having these issues.

Thank you.