Admob ads not loading - Failed to load ad: 0
There is no fault in your code. It's all good. You just need to wait a little. Your ad id is newly created so it will take some time to fetch ads from google servers. You can verify this by adding banner/interstitial ad id you creating for earlier applications and you'll see that they work. So give it some time and it will work soon. At least for me, it happens all the time. Can't surely say for you but why not give it a try?
Admob Failed to load ad: 0
if you connect with firebase than also add maven{url "https://maven.google.com"}in project module gradle and in admob account add the payment detail
Ad failed to load : 3 when trying Admob sample app
I resetted my advertising id in settings -> google and somehow it works now.
Really disappointing how bad the Admob documentation is regarding testing
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