I get the folling error when trying to upload an app to TestFlight with an iMessage stickers extension with XCode 8.0 beta 3:
ERROR ITMS-90644: "Missing Image Asset. Your app is missing the Large App Icon asset 'iMessage App Icon' in 'Payload/App.app/PlugIns/StickerPackExtension.appex'."
Is ITC accepting TestFlight builds at the moment, or is there something wrong with my extension? I've allocated images to every space in my iMessages App Icon in my .xcstickers bundle.
I did notice though that the various "settings" images and the 1024x768 "iMessages App Store" image don't make it through to the built .appex file though.