Backs Lines in Background (GMS 1.4)


Good family, I am making a game for Android, with GMS 1.4
It turns out that when testing the game on the Android device, black lines appear in the background (which are not in the design or in the editor)
Apparently, this is a common problem, because of the aspect ratio acquired by the android device. But after reading similar cases and doing what in theory should work to solve it, not finished to be solved. I've tried everything and there are no ways, I'm already nervous and desperate. Please, someone help me. Regards.:(