If there is a glitch, it's probably only with your phone, since biometrics reside strictly on the user's device. You can do a diagnostic of the fingerprint reader. If your finger was wet or just off the mark, the reader won't read properly. Do the diagnostic and make sure the sensors are working. If the diagnostic shows everything OK, and the problem persists, try resetting your biometrics by either deleting the fingerprint you have, or adding another (you can register up to 3 prints).
