GameKit - iCloud Sign In Error

For the full explanation of the error:

Error Domain=GKErrorDomain Code=35 "The requested operation could not be completed because you are not signed in to iCloud." UserInfo={NSLocalizedDescription=The requested operation could not be completed because you are not signed in to iCloud., NSUnderlyingError=0x600000c8df20 {Error Domain=GameDaemonCore.PseudonymManagerError Code=0 "(null)"}}

Kindly note that my localPlayer is authorized but I cannot get into matchmaking due to iCloud error. I even added iCloud Container within entitlements but didn't work.

Probably too late to help, but I just had a same error on my macOS recently.

Turns out I just needed to sign out of iCloud and sign in again in the system. When I signed back in (with the same account), I needed to accept new terms of service so maybe it was stuck on that.

I'll add my two cents here since I was also hitting this.

It was giving me this error (which I think was a false positive) simply because I wasn't encoding the data correctly.

I was trying to encode using a JSONEncoder when I should have been using a PropertyListEncoder.

Here is a working code snippet:

let encoder = PropertyListEncoder()
let data = try encoder.encode(self.gameData)
let savedGame = try await player.saveGameData(data, withName: "game.data")