Dear Samsung Member,
Greetings from Samsung Customer Support!
Please be assured and to resolve "fingerprint" issue kindly follow the given below steps:-
1. Try after register a new fingerprint. To register a new fingerprint:-
Settings> Bio metric and security>Fingerprints > Continue > Set secure screen lock > Start with center.
2. Check device in safe mode:- Using Safe Mode on a Samsung phone allows you to force the device to run the essential operating system, and disable most 3rd party applications.
To enter in safe mode:- Power off the device > Press and hold the Power key for one or two seconds to turn on the device > When the Samsung logo appears, press and hold the Volume down key.
To exit safe mode: Restart your device.
3. Reset the device and before resetting the device make sure to create backup of your device via Smart Switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite
Settings > General Management > Reset.
After Performing the troubleshooting steps if the issue still persists, kindly get back to us with additional information- Error log File, Video or Screen-shots. This will help us to further investigate and resolve your concern (Samsung Members app > Get help > Feedback > Error report/ask question).
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
Thank you for writing to Samsung.
Samsung Customer Support