"Item not found". Unable to use PurchaseItem()

I have made a catalog, store, and added some items, and also created a bundle.

Now, when I am trying to purchase the bundle by using the following code, it gives an error - Item not Found

I have double checked the spelling of bundle and store. What is going wrong? Please help!

Code:(Unity c#)

  PlayFabClientAPI.PurchaseItem(new PurchaseItemRequest
        {
            StoreId = "curl_store",
            CatalogVersion = "0.1",
            VirtualCurrency = "CU",
            ItemId = "begginer_bundle", 
            Price = 0,
        }, Purchased =>
        {
            Debug.Log("Purchased begginer bundle");
            
        }, Error =>
        {
            Debug.Log(Error.GenerateErrorReport());
            loadingPanel.SetActive(false);
            genderPanel.SetActive(true);
            ShowError("ERROR!", Error.ErrorMessage);
        }
        );