title: React-Native run-android app crashes immediately
body: <p>I am pretty new to react native and try to run an app with <code>react-native run-android</code> so without expo. 
  The app installs successfully but it crashes immediately without errors.
  I've created the app with <code>react-native init myapp</code></p>
  
  <p>When I try to run an app with Android Studio everything works fine. Do you have any tips for me?</p>