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 I found that my billing address was not verified and ads were blocked. Verify billing address it will automatically get fixed. https://www.google.com/adsense/