When I try to retrieveScores from the gamecenter I get the error: "Couldn’t communicate with a helper application."
The leaderboard I am trying to get scores from is a recurring leaderboard.
Previously I have called LoadLeaderboardIds. I am using Prime31 unity plugin to communicate with GameCenter.
Before updating prime31 I had no errors, however I needed to update the plugin to be able to get recurring leaderboards.
I asked on the Prime31 forum, but was told that: "That sounds like an internal Apple error. App code cant launch or communicate with helper apps, only Apple's code can do cross-process communication. You'll want to open a bug report directly with Apple."
The error happens on the iOS build but I have not tested other platforms yet.