Warning to all!
If the game isn't loading at all it's not the app's fault. You just need to remove all permission first and allow it again when you click the app. This will fix everything. You don't need to uninstall and lose the save file. It's just a few seconds waste but it's worth it.
With this, you can fix any blank screen.
This seems to be common for Android 14... I think it will be the same even if you paid the app... Like the app didn't update at all...