title: Failed to load AdMob on flutter
body: <p>Whenever I try to load an ad using AdMob, I get the following error</p>
  
  <pre><code>W/Ads     (23418): There was a problem getting an ad 
  response.ErrorCode: 0
  W/Ads     (23418): Failed to load ad: 0
  W/flutter (23418): onAdFailedToLoad: 0
  I/flutter (23418): BannerAd event is MobileAdEvent.failedToLoad
  </code></pre>
  
  <p>I am using the android emulator and I am using only banner ads and I don't know why this error is occurring.</p>