Touch ID enabled but unable to read fingerprints

I transferred the original home button to the phone after replacing its screen. This is the new screen I used to repair the phone.

Everything seems to work, but Touch ID doesn't seem to be able to recognize fingerprints. When I go to "Add a Fingerprint" and try to add a new one, nothing happens. It doesn't respond to my old fingerprint when unlocking the phone, either. I also tried to reset all settings, but that didn't fix the issue.

I tried re-opening the phone and making sure all the connectors were firmly in place and not loose. I also transferred the metal backplate of the original home button in case it required that as well. Didn't make a difference.