We have a released game in the App Store with Game Center Challenges. The challenges were working well in testing of the final version before the Game Center challenges went live. After release the activity that should take the player to the challenge in game results in this printout and we do not get informed by GKGameActivityListener of the activity happening in our code as we did before the Game Center challenges went live.
“Invalid game activity definition. Failed to kick activity notification to GameKit. Error: Error Domain=GKErrorDomain Code=17 "(null)"”
Also, Game Center reports that the are no challenges in GKChallengeDefinition.all even though there are ongoing challenges.
The leaderboard results do get reported to Game Center though and show up as challenge entries in the Games app.
At the moment we are trying to figure out if this is a problem on our end or a Game Center server issue.