Rewarded ads not going to OnUnityAdsShowComplete

Hello, new to unity, wanted to add a rewarded add video - allready made interstitial w/o much trouble but whatever I try with rewarded ads, it just never goes to
OnUnityAdsShowComplete or OnUnityAdsDidFinish.

It does show an Ad and a Close button, but nothing after that.

I’ve used the standard code in the ads implementation from unity tutorial but it’s not working for some reason.

What am i doing wrong?

Did you get any solution to this problem? because the same thing is happening to me.