Hello, my minSDKVersion is 19 and my Target is 28, although the device I'm running the fingerprint matcher on has an API of 21. (I.E. Lollipop, SDK ). And in the FingerprintTemplate and FingerprintMatcher classes, it shows red underlines saying "Call requires API of 24" how can I get this to support API of 21 at least please. It took me weeks to realise, this is the cause of the crashes.