don't even think about downgrade.. because without root its not possible and you will loose knox security service support forever and cannot use secure folder, Samsung pass, Samsung pay
the problem solved by you only ... for now clear data of fingerprint or check or try a factory reset then check ✔... and if possible then allaways try to install software via smart switch and pc which is process especially in samsung devices because samsung provides non A/B partition type ota software not like other company hence if someone simply update software via mobile data or wifi then anything mysterious can be happened with device by software loop holes formation
Steps to perform. 1) Turn off the device. 2) Press and hold the Volume Up key and the spower button. 3) When the Android logo displays, release all keys. 4) Press the Volume down key to navigate and select "Wipe cache partition". 5) Press Power key to select. When the wipe cache partition is complete, Select Reboot System. 6) Press the Power key to restart the device.
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).
