I changed all photo's to remove alpha and i only get error on uploading, no other place.
WARNING ITMS-90709: "Invalid Image Asset. The image asset 'App Icon - Small' in 'Payload/Hot On! homes.app' is missing an image for the background layer with a scale value of '2'."
Ensure all icons in image assets, are available for all sizes, without any transparency (transparent or semi transparent color) or without rounded corners.