Bug Banner not displayed

I could get the Interstitial ads to work on my Android device, but I could not see any banner ads.

The banner ads are displayed on the Editor but not on Android devices. I am using test mode.

Below, no error message was displayed either. What is wrong???

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using UnityEngine.Advertisements;
4.  
5. public class adsBanner : MonoBehaviour
6. {
7.     public Text ct;
8.     public static string em = "";
9.     [SerializeField] BannerPosition _bannerPosition = BannerPosition.BOTTOM_CENTER;
10.  
11.     [SerializeField] string _androidAdUnitId = "Banner_Android";
12.     [SerializeField] string _iOSAdUnitId = "Banner_iOS";
13.     string _adUnitId = null; // This will remain null for unsupported platforms.
14.  
15.     void Start()
16.     {
17.         // Get the Ad Unit ID for the current platform:
18. #if UNITY_IOS
19.         _adUnitId = _iOSAdUnitId;
20. #elif UNITY_ANDROID
21.         _adUnitId = _androidAdUnitId;
22. #endif
23.  
24.         // Set the banner position:
25.         Advertisement.Banner.SetPosition(_bannerPosition);
26.         LoadBanner();
27.     }
28.  
29.     void OnEnable(){
30.         if (PlayerPrefs.GetInt("ads") == 0) {
31.             RectTransform r = this.GetComponent<RectTransform>();
32.             r.offsetMin = new Vector2(0f, 0f);
33.             return;
34.         }
35.         LoadBanner();
36.     }
37.  
38.     void OnDisable(){
39.         HideBannerAd();
40.     }
41.  
42.     public void LoadBanner()
43.     {
44.         BannerLoadOptions options = new BannerLoadOptions
45.         {
46.             loadCallback = OnBannerLoaded,
47.             errorCallback = OnBannerError
48.         };
49.  
50.         Advertisement.Banner.Load(_adUnitId, options);
51.     }
52.  
53.     void OnBannerLoaded()
54.     {
55.         if (GameObject.Find("Main Menu")) {
56.             HideBannerAd();
57.             return;
58.         }
59.         Debug.Log("Banner loaded");
60.         ShowBannerAd();
61.         RectTransform r = this.GetComponent<RectTransform>();
62.         r.offsetMin = new Vector2(r.offsetMin.x, adHeight());
63.     }
64.  
65.     public static float adHeight()
66.     {
67.         float f = Screen.dpi / 160f;
68.         float dp = Screen.height / f;
69.         return (dp > 720f) ? 90f * f
70.               : (dp > 400f) ? 50f * f
71.               : 32f * f;
72.     }
73.  
74.     void OnBannerError(string message)
75.     {
76.         em= message;
77.     }
78.  
79.     void Updata()
80.     {
81.         ct.text = em;
82.     }
83.  
84.     void ShowBannerAd()
85.     {
86.         BannerOptions options = new BannerOptions
87.         {
88.             clickCallback = OnBannerClicked,
89.             hideCallback = OnBannerHidden,
90.             showCallback = OnBannerShown
91.         };
92.  
93.         Advertisement.Banner.SetPosition(_bannerPosition);
94.         Advertisement.Banner.Show(_adUnitId, options);
95.         Advertisement.Banner.SetPosition(_bannerPosition);
96.  
97.     }
98.  
99.     void HideBannerAd()
100.     {
101.         Advertisement.Banner.Hide();
102.     }
103.  
104.     void OnBannerClicked() { }
105.     void OnBannerShown() { }
106.     void OnBannerHidden() { }
107.  
108.     void OnDestroy()
109.     { }
110. }

 

Do I need to publish the app on Google Play Store first?

 

I deleted Google Mobile Ads. Do I need to keep it?

 

I turned on Unity Ads on the Services window, and updated the library to the latest version. It is working now.