And that's because your laptop is a thinkpad, indeed I got my fingerprint reader working on my ideapad because it has the same fingerprint reader of a thinkpad, but to get it working I needed to install the driver myself
Weirdly enough, I've never got fprint working on my thinkpad (albeit I've only attempted twice).
Both times, it works fine whenever I only set up my index finger. Adding my thumb (or any other finger) then prevents either from working, removing either finger removes both, and then prevents me from adding it back.
I have no idea why I'm having this issue, but I'm assuming I'm just missing something.