Failed to use play service save game

I am struggling with problem that saved games in googl play services aren't event started!

The code:

Code (CSharp):

1. PlayGamesClientConfiguration config = new PlayGamesClientConfiguration.Builder()
2.             .RequestServerAuthCode(false)
3.             .EnableSavedGames()
4.             .Build();
5.  
6.         PlayGamesPlatform.InitializeInstance(config);
7.         PlayGamesPlatform.DebugLogEnabled = true;
8.         PlayGamesPlatform.Activate();

Than, on button clicked:

Code (CSharp):

1. Social.localUser.Authenticate(HandleConnected);

HandleConnected:

Code (CSharp):

1.  public void ShowSaveSystemUI(ILocalUser user, Action<SelectUIStatus, ISavedGameMetadata> callback)
2.     {
3.         uint maxNumToDisplay = 3;
4.         bool allowCreateNew = true;
5.         bool allowDelete = true;
6.  
7.         ISavedGameClient savedGameClient = PlayGamesPlatform.Instance.SavedGame;
8.  
9.         if (savedGameClient != null)
10.         {
11.             savedGameClient.ShowSelectSavedGameUI(user.userName + "\u0027s saves",
12.                                                   maxNumToDisplay,
13.                                                   allowCreateNew,
14.                                                   allowDelete,
15.             (SelectUIStatus status, ISavedGameMetadata saveGame) =>
16.             {
17.                  // some error occured, just show window again
18.                  if (status != SelectUIStatus.SavedGameSelected)
19.                 {
20.                     ShowSaveSystemUI(user, callback);
21.                     return;
22.                 }
23.  
24.                 if (callback != null)
25.                     callback.Invoke(status, saveGame);
26.  
27.                 if (OnSaveGameSelected != null && status == SelectUIStatus.SavedGameSelected)
28.                     OnSaveGameSelected.Invoke();
29.             });
30.  
31.         }
32.         else
33.         {
34.             // this is usually due to incorrect APP ID
35.             Debug.LogError("Save Game client is null...");
36.         }
37.     }

And i am always getting this error:

Code (CSharp):

1. 08-18 23:43:04.451: E/Unity(30152): NotImplementedException: You must enable saved games before it can be used. See PlayGamesClientConfiguration.Builder.EnableSavedGames.
2.  

Authorization is successfully proceeded. Console settings includes saved games and they are switched on. What should i do?