I'm doing a 2D Android game (still learning) with Unity, but I had problems when I tried to export to see how the Android home screen was going to be. Unity gave this error:
Bundle identifier has not been setup correctly
Please set the bundle identifier in the player settings 'com.YourCompanyName.YpurProductName'. The value must follow the convention and can contain alphanumeric characters and underscore. Each segment should not start with a numeric character or underscore.
I tried to resolve updating the Android SDK because I thought that files were missing, since when I export to other platforms like Windows and Linux it works perfectly, but it did not work.