This method of reporting scores appears to be deprecated with the introduction of iOS 7.0
Here is the code that will fix the problem:
GKScore *reportScore = [[GKScore alloc] initWithLeaderboardIdentifier:@"leaderBoardI"];
reportScore.value = totalPoints;
NSArray *scores = @[reportScore, nil];
[GKScore reportScores:scores withCompletionHandler:nil];