Unity Ads doesn't work on the device

I am using the unity Monetization SDK to monetize my game. The videos and banner work in the Editor but when testing on the Device it doesn't work, I already checked if the connection with the project in the dashborad is correct, the IDs are all correct, but I don't know why it doesn't work

My code:

The IDs are not XXXXXXX, of course.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Advertisements;
5. public class AdsController : MonoBehaviour, IUnityAdsListener
6. {
7. #if UNITY_IOS
8.      private string gameId = "XXXXXXX";
9. #elif UNITY_ANDROID
10.      private string gameId = "XXXXXXX";
11. #endif
12.      string rewardedPlacement = "rewardedVideo";
13.      string videoPlacement = "video";
14.      string bannerPlacement = "banner";
15.      public GameController gameController;
16.      public Swipe swipeController;
17.      public UIAnimation uiAnimation;
18.      // Start is called before the first frame update
19.      void Start()
20.      {
21.          Advertisement.AddListener(this);
22.          Advertisement.Initialize(gameId, true);  
23.      }
24.      public void ShowVideoAds()
25.      {
26.          Advertisement.Show(videoPlacement);
27.      }
28.      public void ShowRewardedAds(string p)
29.      {
30.          Advertisement.Show(p);
31.      }
32.      public void ShowBanner()
33.      {
34.          Advertisement.Banner.SetPosition(BannerPosition.BOTTOM_CENTER);
35.          Advertisement.Banner.Show(bannerPlacement);
36.      }
37.      public void OnUnityAdsDidFinish(string placementId, ShowResult showResult)
38.      {
39.          if(showResult == ShowResult.Finished)
40.          {
41.           //Rewarded
42.          }
43.          else if (showResult == ShowResult.Skipped)
44.          {
45.              // Do not reward the user for skipping the ad.
46.          }
47.          else if (showResult == ShowResult.Failed)
48.          {
49.              Debug.LogWarning("The ad did not finish due to an error");
50.              }
51.       }
52. }

 

I was able to solve the problem by downloading the unity Ads 3.4.2. Version 3.4.4 has an error in saying that unity ads are duplicated.
You should fix this error in the next version.