Question UnityPurchasing.Initialize doesn't work after initializing UGS

I updated the new IAP version and it said it requires initializing UGS first.
So I added it in my code (I'm not using codeless IAP) but I got a problem with my IAP.
my code is below.


using UnityEngine;
using System;
using UnityEngine.Purchasing;
using Unity.Services.Core;
using Unity.Services.Core.Environments;
public class IAPManager : MonoBehaviour, IStoreListener
{
private static IStoreController m_StoreController;
// The Unity Purchasing system.
private static IExtensionProvider m_StoreExtensionProvider;
// The store-specific Purchasing subsystems.
public string[] PRODUCT_PACKAGE;
//Unity Gaming Services
const string k_Environment = "production";
void Awake()
{
// Uncomment this line to initialize Unity Gaming Services.
Initialize(OnSuccess, OnError);
}
void Initialize(Action onSuccess, Action<string> onError)
{
try
{
var options = new InitializationOptions().SetEnvironmentName(k_Environment);
UnityServices.InitializeAsync(options).ContinueWith(task => onSuccess());
}
catch (Exception exception)
{
onError(exception.Message);
}
}
void OnError(string message)
{
}
void OnSuccess()
{
Debug.Log("Success");
// If we haven't set up the Unity Purchasing reference
if (m_StoreController == null)
{
// Begin to configure our connection to Purchasing
InitializePurchasing();
}
}
public void InitializePurchasing()
{
// If we have already connected to Purchasing ...
if (IsInitialized())
{
// ... we are done here.
return;
}
// Create a builder, first passing in a suite of Unity provided stores.
var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());
// Add a product to sell / restore by way of its identifier, associating the general identifier
// with its store-specific identifiers.
for (int i = 0; i < PRODUCT_PACKAGE.Length; i++)
{
builder.AddProduct(PRODUCT_PACKAGE, ProductType.Consumable);
}
// Kick off the remainder of the set-up with an asynchrounous call, passing the configuration
// and this class' instance. Expect a response either in OnInitialized or OnInitializeFailed.
UnityPurchasing.Initialize(this, builder);
}
private bool IsInitialized()
{
// Only say we are initialized if both the Purchasing references are set.
return m_StoreController != null && m_StoreExtensionProvider != null;
}
public void OnInitialized(IStoreController controller, IExtensionProvider extensions)
{
// Purchasing has succeeded initializing. Collect our Purchasing references.
Debug.Log("OnInitialized: PASS");
// Overall Purchasing system, configured with products for this application.
m_StoreController = controller;
// Store specific subsystem, for accessing device-specific store features.
m_StoreExtensionProvider = extensions;
}
public void OnInitializeFailed(InitializationFailureReason error)
{
// Purchasing set-up has not succeeded. Check error for reason. Consider sharing this reason with the user.
Debug.Log("OnInitializeFailed InitializationFailureReason:" + error);
}




I've checked it calls 'UnityPurchasing.Initialize(this, builder); ' normally.
but after calling it, 'OnInitialized' and 'OnInitializeFailed', both are not called at all.
Please help me.


*When I try to buy an in-app item, it said it was not initialized.