title: react-native run-android command terminates by leaving a message in android Device
body: <p><a href="https://i.stack.imgur.com/GU7OS.jpg" rel="nofollow noreferrer">react-native run-android command terminates by leaving a message in android simulator. The message is as follows:</a>
  The development server returned response erre code: 500</p>
  <p>What am I doing wrong?</p>