Top Ranking in Unity?

Question

C++ / C#

I made top rating in unity here is the code

using UnityEngine;
using System.Collections;
using GooglePlayGames;
using GooglePlayGames.BasicApi;
using UnityEngine.SocialPlatforms;

public class test : MonoBehaviour
{

  void Start (){
    PlayGamesPlatform.Activate();
  }

  void vhod (){
    Social.localUser.Authenticate((bool success) => {

    });
  }

  void dostijenie() {
    Social.ReportProgress("CgkI2pnKuuEFEAI---", 100.0f, (bool succes) => {

    });
  }

  void opublik(){
    Social.ReportScore(12345, "CgkI2pnKuuEFEAI---", (bool succes) => {

    });
  }

}

But the program throws the error

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.GameObjectInspector.ClearPreviewCache () (at <480b5a3bd3214ce5831f6dd8c68fdc55>:0)
UnityEditor.GameObjectInspector.OnDisable () (at <480b5a3bd3214ce5831f6cdd5c68:
UnitEditor.Database:UnitEditor.fd0 ) Refresh()
GooglePlayGames.Editor.GPGSUpgrader:.cctor() (at Assets/GooglePlayGames/Editor/GPGSUpgrader.cs:102)
UnityEditor.EditorAssemblies:ProcessInitializeOnLoadAttributes(Type[])

I'm new to Unity! Please provide an explanation!
(I googled)

Answer 1

And what they googled gives an error in the GPGSUpgrader file in the Editor folder, see the error there