Banner Ad (even test ads) don't load in Android

Hi I have the simple banner ad attached below

Code (CSharp):

1. public class BannerAdScript : MonoBehaviour
2. {
3.  
4.  
5.     public string placementId = "bannerAd";
6.  
7.  
8.     void Start()
9.     {
10.         // Initialize the SDK if you haven't already done so:
11.         Advertisement.Initialize(AppConstants.GAME_ID, MasterController.Instance.TestAds());
12.  
13.         StartCoroutine(ShowBannerWhenReady());
14.         Debug.Log("loading banner ad");
15.  
16.  
17.     }
18.  
19.     IEnumerator ShowBannerWhenReady()
20.     {
21.         while (!Advertisement.IsReady(placementId))
22.         {
23.             yield return new WaitForSeconds(0.5f);
24.         }
25.  
26.         Advertisement.Banner.SetPosition(BannerPosition.TOP_RIGHT);
27.         Advertisement.Banner.Show(placementId);
28.     }
29. }

However ads do not show, even test ads, I checked the game id and placement id is correct but nothing is loaded, the ad never becomes ready

Am I missing something here? My app is landscape, should it matter?

Thanks

 

@ZEBEDEE_ENGINEERING

Did you solve this? i would like to know how

 

Yes I did, it was caused by the ad initiating script being included in a gameobject that was instantiated at runtime via prefab, once I added the ad script to a gameobject that was present before runtime it worked fine