Seeing the same thing in XCode 26.4 when trying to view leaderboard "Could not create endpoint for service name: com.apple.GameOverlayUI.dashboard-service Failed to create GameOverlayUI Dashboard Remote Proxy" This is happening for iPad or iPhone simulation running 26.4. Same code worked fine simulating under XCode 16

Code-level support finally responded with a very generic request for a reduced project to duplicate problem. Apparently, they did not read that the problem was only for a particular user after they upgraded, so reproducing the error only works if they can log into GameCenter as that particular user. Recompiled using XCode 26.4 and the problem appears to go away.

I tried gemini-recommended strategy of calling loadMatchesWithCompletionHandler (all matches) - made no difference. A 5-second delay seems to solve the problem, at least for now.

I put my video through iMovie and saved as App Preview and I am STILL getting the "too large" error message - the file is 18.9 MB, 2:05 long. Nevermind. I see now it has to be 15-30 seconds.

Still no response to code-level support request. Today is 3/6, so it's been 6 weeks. Does Apple actually do code-level support? Can the backlog be that deep even to send something other than the automatic "we received your request?"

Submitted code-level request on 1/24. Today is 2/3 and still have not heard back.

Two-second delay seemed to work for awhile - I even saw it trigger the loadMatchWithID because it got stale data. Then, I even got stale data on a loadMatchWithID. Not sure how to proceed with this.

At the moment, my workaround is to call loadMatchWithID after a 2-second delay if the match received by receivedTurnEventForMatch shows that the current participant is not the localPlayer.

While waiting to hear back on my code-level request, I did a debug build that called: [GKTurnBasedMatch loadMatchesWithCompletionHandler:^(NSArray<GKTurnBasedMatch *> *matches, NSError *error) { It showed that the matches ARE there, but the MatchMaker ViewController is not showing them!

I have submitted a code-level support request, though I it's hard to imagine what I could be doing wrong in calling up the MatchMaker ViewController: GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer]; if (!localPlayer.isAuthenticated) { [self matchError]; return; } GKMatchRequest *request = [[GKMatchRequest alloc] init]; request.minPlayers = 2; request.maxPlayers = 2; // Configure other request properties as needed GKTurnBasedMatchmakerViewController *mmvc = [[GKTurnBasedMatchmakerViewController alloc] initWithMatchRequest:request]; mmvc.turnBasedMatchmakerDelegate = self; // Assuming self conforms to GKTurnBasedMatchmakerViewControllerDelegate mmvc.showExistingMatches = YES; // should be default, but maybe Jamie's problem? [self presentViewController:mmvc animated:YES completion:^{ // Code to run after the presentation completes (if any) NSLog(@"Presented GKTurnBasedMatchmakerViewController"); }]; }

I've released the app in to the app store and the user still has the same problem on his iPad Air 4th generation running iOS 26.2 - he can create turn-based-matches and take his turn, but they do not appear when the MatchMaker ViewController is opened.

I believe that if the recipient of the invitation doesn't have the game installed, the invitation comes via iMessage and it sends them to the app store to download the app. When they download the app - there should be a "Match" option/menu that opens the MMVC.

There is something called the MatchMaker ViewController. Your app should open this up - that's where your list of open matches lives.

I'm no expert on this, but the logical way for it to work is that PersonA requests an automatch. If no one else has an active request for an automatch, PersonA starts the game and takes their turn. They are then waiting for an automatch. PersonB requests an automatch and GameCenter sees that PersonA has started an automatch game, so hands the turn to PersonB. PersonB plays and, for a two player game, GameCenter hands the turn to PersonA. Extrapolating this to additional players is left as an exercise to the reader.

There sure area lot more questions posted than helpful replies in these forums. No response even by Apple. I submitted a request for help and they asked for screenshots! Of what? The lack of a banner notification? Upshot of it all, if you're having this problem, move your app to Test Flight - that uses the production notification system, whereas Xcode and the simulator do not and are very low priority. After moving my app to Test Flight, I got all the notifications expected.