Still the same error after installing the latest update off all plug-ins in Unreal Engine IDE.
Error in Google Play Developers console after uploading:
Caused by java.lang.IllegalArgumentException: com.my.MYAPP: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
I cannot find a way to specify FLAG_IMMUTABLE or FLAG_MUTABLE without changing code that is overwritten by Unreal when rendering the game.
Any help is appreciated!