I've run into some problems while working on my Google AdMob plugin. I've added some mediation networks and I'm trying to test if ads load for each network/ad unit, but AdInspector isn't working on iOS or Android. (I'm using Unity v2021.3)
When I try to open it using GoogleMobileAds.Api.MobileAds.OpenAdInspector, I get an "Ad Inspector failed to load" error, then it just closes. I'm using the correct test device IDs too.
AdInspector was working a week or two ago, so I'm not sure what happened. I'm using AdMob v8.3.0. Any ideas what might be causing this or how to fix it?