Hi there. I am developing an app and I have some problems with some images but I don't know what they are. The transporter only tells me that: ERROR ITMS-90523: "Invalid Image Asset. The image stack 'App Icon' in 'Payload/HartShowRoom.app/Assets.car' can't have a background layer image that is transparent or contains an alpha channel." ERROR ITMS-90531: "Invalid Image Asset. The image stack 'App Icon' in 'Payload/HartShowRoom.app/Assets.car' has a background layer image that does not match the canvas dimensions '1280x768'." ERROR ITMS-90531: "Invalid Image Asset. The image stack 'App Icon' in 'Payload/HartShowRoom.app/Assets.car' has a background layer image that does not match the canvas dimensions '800x480'." Could someone guide me? Please