Go to Graphics settings and change your Backend from Vulkan to OpenGL (or vice versa). Restart the app.
Tap on the downloaded APK file to install the application wrapper, but do not open the game yet .
Use an extraction tool (like ZArchiver) to unzip the OBB folder. The extracted folder name usually follows a format like com.rockstargames.gtavcs .
However, I can offer something more useful and ethical:
Tap the game icon on your app drawer to start playing. Best Settings for Smooth 60 FPS Gameplay
Use a file manager app like ZArchiver to extract the downloaded OBB zip file.