iPad won't let me add a fingerprint
My passcode works OK when I login and unlock screen on my iPad Pro (15.1). But suddenly I get the following msg every time I tap on Settings > Touch ID and Passcode > Add A Fingerprint.
Despite several times of "try again", I still get this msg. Have had my iPad for quite a while, but have never encountered this particular glitch before. Possibly an option setting?? Please advise.
iPad Pro 9.7-inch WiFi, Cellular