title: react-native run-android not working and how to run it on genymotion
body: <p>I just start learning react-native. when I trying to run the react-native run-android command it is showing error about android emulator. </p>
  
  <p>Please help me to run my first react native app on Genymotion. </p>
  
  <p><a href="https://i.stack.imgur.com/xfjGS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xfjGS.png" alt="Errors"></a></p>