Game crashes when launch to Android

While I was using 4.15.2 the game ran on mobile fine but after I upgraded to project to version 4.16.1 the game crashes when I launch it to android mobile. It just flashes a black screen then shows “Unfortunately the app has stopped”. As I said this problem didn’t happen on 4.15.2. I tried to roll the game back to 4.15.2 but that didn’t fix the problem. Can someone kindly help me with this problem.

you must check de logcat Log
go to C:\NVPACK\android-sdk-windows\tools
monitor.bat
(it takes a while to open)

then check the log when you run the app and when it crashes (FATAL ERROR probably) then someone could help you easily.
You can save the log and post it here and wait for someone to deciphers the log and finds the problem.