If you are using a modified version of infinite flight, it won’t receive updates, nor will it be officially supported. I recommend you install the proper version of the application from whichever app store your device uses as your phone should support the current version of Infinite Flight with its hardware.
A Snapdragon 625 and an Adreno 506 are enough to run the simulator on at least a mix of medium and high settings. You should never use modified software. Not only is it bad for the initial developer, it could be harmful to your device also.
19.4 included important framework to allow support for the new features, as a result the older version (19.3 and under) is no longer compatible