Re-Scan fingerprint for recognition
For smoother recognition, re-scan your fingerprint after installing the screen protector. Failing to redo the setup may lead to your device being unable to recognize your fingerprint.
If your fingers are too dry, fingerprint recognition may fail.
Settings > Biometrics and security menu > Re-add your fingerprints (during the scanning process, press your finger print to make sure your are capturing a wide surface area) > Make additional registrations of the same fingerprint.