Placement 'interstial' does not exist for gameId: 'GAMEID'

Hello !
I'm currently trying to implement UnityAdvertisment(3.7.5) into my android Game and facing some issues to load the ads (and therefore I can never show them). I have followed the Integration Guide to setup my AdsManager which implements the following interfaces :

Code (CSharp):

1. AdsManager : MonoBehaviour, IUnityAdsInitializationListener, IUnityAdsLoadListener, IUnityAdsShowListener
2. {}

I have linked my game project to the Unity Ads Service in the Editor, and when I Initialize the Advertisment SDK everything seems to be OK

Code (CSharp):

1. Advertisement.Initialize(_gameId, _testMode, _enablePerPlacementMode, this);

However when I try to Load the Ad, I enter the CallBack function

Code (CSharp):

1. public void OnUnityAdsFailedToLoad(string adUnitId, UnityAdsLoadError error, string message)

with the following error message : Placement Interstitial_Android does not exist for gameId: *******

However everything is set up in the Editor : Services


And as well in the Unity Ads Dashboard


I also have referenced the right Ad Units in my code:


And here is the method I use to Load the Ad

Code (CSharp):

1. public void LoadAd()
2.     {
3.         var adUnitId = (Application.platform == RuntimePlatform.IPhonePlayer) ? Ads.AdUnit.IOS_INTERSTITIAL : Ads.AdUnit.ANDROID_INTERSTITIAL;
4.         Debug.Log("Loading Ad: " + adUnitId);
5.         Advertisement.Load(adUnitId, this);
6.     }

I have no errors or exceptions. But just always go to the Failure Callback.

I'm using Unity 2020.3.18f1

 

I will reply to myself, but it may help other people.
Unity has recently launched the mediation service (which is in beta right now). The problem came from the mediation, that seems not working the same way as the default ads SDK. Once I have created another Ads Project from the Dashboard, everything went back and works well. So if you face the same issue as me, it may be due of your choice of Mediation service.

 

Thanks! I had the same issue.
You can revert Mediation to Unity (not mediated) in existing project and the problem disappears

 

thanks a lot

 

but how can I revert mediation service?

 

I would be glad to know how can I do it?