admob getting an ad response. ErrorCode: 0 Failed to load ad:0

Question

I have followed many answers about that error here, but my problem is not solved. Every time I run my app no ads appear and I get this error message in Logcat:

Answer 1

Make sure your ads not violate Google Ads rule, otherwise you have to fill appeal form first to contact AdMob support and after they re-enable your ads serving, ads should appear.