If your phone is rooted, you will be unable to use your fingerprint to log in to the app. However, you can continue to log in to the app using your app passcode.
What is a rooting?
Rooting is the process of allowing users of smartphones, tablets and other devices running the Android mobile operating system to attain privileged control (known as root access) over various Android subsystems.
Rooting is often performed with the goal of overcoming limitations that carriers and hardware manufacturers put on some devices.
For the Samsung S7 range, the phone will need to have the display scaling setting set to standard.