title: error on react-native run-android while installation , can't run in windows 10
body: <p>I am currently running Windows 10. I followed all the steps on the documentation regarding android development on <a href="https://facebook.github.io/react-native/docs/getting-started" rel="nofollow noreferrer">https://facebook.github.io/react-native/docs/getting-started</a> but got the following error:</p>
  
  <p><a href="https://i.stack.imgur.com/2zB2F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2zB2F.png" alt="enter image description here"></a></p>
  
  <p>I tried uninstalling and cleaning my installation directories twice, but still it has the same error.</p>
  
  <p>I really want to setup my development environment for React Native, but I don't know what action to do next.</p>
  
  <p>The versions I'm using (latest):
  react-native-cli: 2.0.1
  react-native: 0.56.0</p>
  
  <p>Any help would be greatly appreciated. Thanks!</p>
  
  <p>EDIT - here's the output of <code>react-native start</code></p>
  
  <p><a href="https://i.stack.imgur.com/6dzki.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6dzki.png" alt="enter image description here"></a></p>