title: React native google admob error?
body: <p>good morning everyone, </p>
  
  <p><strong>steps i took:</strong></p>
  
  <p><code>npm install --save react-native-admob@next,
  npm install</code> </p>
  
  <p>then i went on implementing admob in my app, bear in mind i am using expo SDK, </p>
  
  <p>the code look like this:</p>
  
  <pre><code>import {AdMobBanner} from 'react-native-admob';
  ....
  render(){
  return(
  &lt;AdMobBanner
                adSize="fullBanner"
                adUnitID="ca-app-pub-123456789/12321312"
                testDevices={[AdMobBanner.simulatorId]}
                onAdFailedToLoad={error =&gt; console.error(error)}
              /&gt;
  )
  }
  </code></pre>
  
  <p><strong>the error is :</strong> </p>
  
  <p>invariant violation native component for RNGADBannerView does not exist </p>
  
  <p>i did pull an all nighter, and still couldn't figure it out! 
  please can anyone help. </p>