title: Can't find variable: _d when running react native app for the first time
body: <p>I just created react native app using <code>react-native init demoone</code> and started js server using <code>react-native start</code> then trying to execute the app with <code>react-native run-android</code> 
  But i am getting the following error in emulator when it is installed.</p>
  
  <p>can't find variable: _d(<code>http://10.0.2.2:8081/index.bundle?platform=android&amp;dev=true&amp;minify=false:1</code>)</p>
  
  <p><a href="https://i.stack.imgur.com/2tKDi.png" rel="noreferrer"><img src="https://i.stack.imgur.com/2tKDi.png" alt="enter image description here"></a></p>