"We are trying to add required Game Center assets to our Apple TV project. We are using the source code version of UE4. It seems that the editor UI does not support adding the Game Center leaderboard images nor the Dashboard image. If there is some more configuration work that we should do in order to get this working, any tips to the right direction would be much appreciated."
UATHelper: Packaging (tvOS): / com.apple.actool.errors / UATHelper: Packaging (tvOS): /Volumes/Samsung_T5_1/Perforce_OH2_DEV/Unreal/OH2/Intermediate/TVOS/Resources/Assets.xcassets: error: The tag combination "com.apple.gamecenter.Dashboard Image" for "Dashboard Image.gcdashboardimage/Logo.imageset/oceanhorn-logo-1.png" has no output specification.
The script should complete and add the new resources to the resulting ipa file.
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-85020 in the post.