Remove alpha channel from screenshots
Some exports come with some transparency (usually, a small bar just above the text), which is then refused on the App Store Connect. It’s possible to remove it using Photoshop tho.
Would it be possible for you to fix that ?
Example below :

Comments1
Aryan Bhasin
May 12
Fixed. Please try exporting again.
(If issue still comes up, feel free to report again / comment here)