Fix for Stickers AppExtensions: fails to complete Apple Store validation17 May 2018 | fix app-extensions
Event after fixing signature case apple keeps rejecting applications with Stickers app extension with message:
Invalid iMessage App - Your iMessage app contains an invalid sticker pack. The app may have been built or signed with non-compliant or prerelease tools. For more information, go to developer.apple.com.
user @sofroma investigated case and has found that Xcode additionally copies support files into Apple store package. The package was missing following files:
These files are part of iPhoneOS platform and available as part of Xcode at following location: