Try deleting fingerprint data in biometrics and security settings.
After doing the above if the problem still persists then go to settings and search com.samsung.android.biometrics.app.setting Tap on that and click on battery Under that optimize battery click on it and disable it.
We acknowledge your query and apologize for the same. Please perform the below mentioned steps to resolve the issue:
* To improve recognition performance, register fingerprints of the hand used most often to perform tasks on the device.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
