Admob No fill from ad server - failed to load ad: 3

Question

My issue is that ads are not being displayed at all in my app, test mode or not. I am going to keep this question specific to test mode, and once I get that working I will w

Answer 1

In my case this was the error as result of requesting a geo-restricted ad from a region that's not supported for that ad. If I hardcoded the location for the ad request bundle to be inside the acceptable region, or not include a location in the request at all, the ad was rendered just fine; otherwise I had the same error as OP in console.