ARcore "Session.CheckAvailablity().result" getting "Unknown Error" and App Crashes immediately

Hello Devs, i have been trying to solve this problem since couple of weeks and i failed to solve. this problem is with Google AR core SDK and I am using unity 2019.3.1f1 and Latest arcore sdk.

Problem : When i Check Session.CheckAvailablity(); that is fine no exception catches but after when i trying to get result i always recieved "Unkown Error" on Supported Device and Unsupported Device and after that application crashed immediately.

I have reasearched on Internet but i didn't get any Suitable Option for this.

My Script for Checking "Session.CheckAvailablity()" with different types of function:

 using System.Collections;
  using UnityEngine;
  using GoogleARCore;
  using UnityEngine.UI;
  using System;
  
  public class TestingARSupport : MonoBehaviour
  {
      [SerializeField] private GameObject LogPrefab;
      [SerializeField] private Transform DebugContainer;
  
      public void Check()
      {
          StartCoroutine(CheckCompatibility());
      }
      public void Check2()
      {
          StartCoroutine(CheckCompatibility2());
      }
      public void Check3()
      {
          StartCoroutine(CheckCompatibility3());
      }
      private void CopyToClipBoard(string Txt)
      {
          CustomNameSpace.Server.Clipboard = Txt;
      }
      private IEnumerator CheckCompatibility()
      {
          CreateLog("");
          AsyncTask<ApkAvailabilityStatus> checkTask = null;
          try
          {
              checkTask = Session.CheckApkAvailability();
              CreateLog("Checking Request Created");
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Create \"Checking Request Created\":</b>" + '\n' + "<color=red>" + e + "</color>");
              //Debug.LogExeption(e, this);
          }
          CustomYieldInstruction customYield = checkTask.WaitForCompletion();
          /*try
          {
              customYield = checkTask.WaitForCompletion();
              CreateLog("Please Wait Checking Request Has been Sent");
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Create \"Checking Request Created\":</b>" + '\n' + "<color=red>" + e + "</color>");
              //Debug.LogException(e, this);
          }*/
          CreateLog("Checking For Result Please Wait");
          yield return checkTask.WaitForCompletion();
          CreateLog("Result Created Successfuly");
          try
          {
              ApkAvailabilityStatus result = checkTask.Result;
              /*try
              {
                  result = checkTask.Result;
                  CreateLog("Checking Is Completed, result will be soon");
              }
              catch (Exception e)
              {
                  CreateLog("<b>Sorry Failed To Load Result:</b>" + '\n' + "<color=red>" + e + "</color>");
                  //Debug.LogException(e, this);
              }*/
              switch (result)
              {
                  case ApkAvailabilityStatus.SupportedApkTooOld:
                      CreateLog("Supported apk too old");
                      break;
                  case ApkAvailabilityStatus.SupportedInstalled:
                      CreateLog("Supported and installed");
                      break;
                  case ApkAvailabilityStatus.SupportedNotInstalled:
                      CreateLog("Supported, not installed, requesting installation");
                      break;
                  case ApkAvailabilityStatus.UnknownChecking:
                      CreateLog("Unknown Checking");
                      break;
                  case ApkAvailabilityStatus.UnknownError:
                      CreateLog("Unknown Error");
                      break;
                  case ApkAvailabilityStatus.UnknownTimedOut:
                      CreateLog("Unknown Timed out");
                      break;
                  case ApkAvailabilityStatus.UnsupportedDeviceNotCapable:
                      CreateLog("Unsupported Device Not Capable");
                      break;
              }
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Load Result:</b>" + '\n' + "<color=red>" + e + "</color>");
              Debug.LogException(e, this);
          }
      }
      private IEnumerator CheckCompatibility2()
      {
          CreateLog("");
          AsyncTask<ApkAvailabilityStatus> checkTask = null;
          try
          {
              checkTask = Session.CheckApkAvailability();
              CreateLog("Checking Request Created");
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Create \"Checking Request Created\":</b>" + '\n' + "<color=red>" + e + "</color>");
              //Debug.LogExeption(e, this);
          }
          CreateLog("Checking For Result Please Wait");
          while (!checkTask.IsComplete)
          {
              yield return null;
          }
          CreateLog("Result Created Successfuly");
          try
          {
              ApkAvailabilityStatus result = checkTask.Result;
              /*try
              {
                  result = checkTask.Result;
                  CreateLog("Checking Is Completed, result will be soon");
              }
              catch (Exception e)
              {
                  CreateLog("<b>Sorry Failed To Load Result:</b>" + '\n' + "<color=red>" + e + "</color>");
                  //Debug.LogException(e, this);
              }*/
              switch (result)
              {
                  case ApkAvailabilityStatus.SupportedApkTooOld:
                      CreateLog("Supported apk too old");
                      break;
                  case ApkAvailabilityStatus.SupportedInstalled:
                      CreateLog("Supported and installed");
                      break;
                  case ApkAvailabilityStatus.SupportedNotInstalled:
                      CreateLog("Supported, not installed, requesting installation");
                      break;
                  case ApkAvailabilityStatus.UnknownChecking:
                      CreateLog("Unknown Checking");
                      break;
                  case ApkAvailabilityStatus.UnknownError:
                      CreateLog("Unknown Error");
                      break;
                  case ApkAvailabilityStatus.UnknownTimedOut:
                      CreateLog("Unknown Timed out");
                      break;
                  case ApkAvailabilityStatus.UnsupportedDeviceNotCapable:
                      CreateLog("Unsupported Device Not Capable");
                      break;
              }
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Load Result:</b>" + '\n' + "<color=red>" + e + "</color>");
              Debug.LogException(e, this);
          }
      }
      private IEnumerator CheckCompatibility3()
      {
          CreateLog("");
          try
          {
              Session.CheckApkAvailability();
              CreateLog("Checking Request Created");
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Create \"Checking Request Created\":</b>" + '\n' + "<color=red>" + e + "</color>");
              //Debug.LogExeption(e, this);
          }
          CreateLog("Checking For Result Please Wait");
          while (!Session.CheckApkAvailability().IsComplete)
          {
              yield return null;
          }
          CreateLog("Result Created Successfuly");
          try
          {
              ApkAvailabilityStatus result = Session.CheckApkAvailability().Result;
              switch (result)
              {
                  case ApkAvailabilityStatus.SupportedApkTooOld:
                      CreateLog("Supported apk too old");
                      break;
                  case ApkAvailabilityStatus.SupportedInstalled:
                      CreateLog("Supported and installed");
                      break;
                  case ApkAvailabilityStatus.SupportedNotInstalled:
                      CreateLog("Supported, not installed, requesting installation");
                      break;
                  case ApkAvailabilityStatus.UnknownChecking:
                      CreateLog("Unknown Checking");
                      break;
                  case ApkAvailabilityStatus.UnknownError:
                      CreateLog("Unknown Error");
                      break;
                  case ApkAvailabilityStatus.UnknownTimedOut:
                      CreateLog("Unknown Timed out");
                      break;
                  case ApkAvailabilityStatus.UnsupportedDeviceNotCapable:
                      CreateLog("Unsupported Device Not Capable");
                      break;
              }
          }
          catch (Exception e)
          {
              CreateLog("<b>Sorry Failed To Load Result:</b>" + '\n' + "<color=red>" + e + "</color>");
              Debug.LogException(e, this);
          }
      }
  }