Seems like Unity deleted IUnityAdsListener and made other interfaces for ads listeners so i’m kinda stuck for this moment(
In Unity support some nice guy gave me a link - i’ll try these and then update this
https://docs.unity.com/ads/ImplementingRewardedAdsUnity.html
Which version of the Ads are you using? It looks, from your link, that they’ve broken out the interface into blocks to make it so you can implement fewer methods.
i use the lastest (2022.1.4f Unity and advertisment 4.1.0 and yeap they’ve broken the whole thing) but the link i’ve gave, actually works - but now you must implement (all three?) interfaces instead of one.