title: Uncaught error in the transformer worker
body: <p>I'm trying to run a sample code from react-player's repository.
  But I continue to get the following error :</p>
  
  <pre><code>Error: Uncaught error in the transformer worker: /Users/idesirejustice/Projects/Tests/HelloWorld/node_modules/react-native/packager/transformer.js
    at _transform.then.catch.error (/Users/idesirejustice/Projects/Tests/HelloWorld/node_modules/react-native/packager/src/JSTransformer/index.js:110:33)
    at &lt;anonymous&gt;
    at process._tickCallback (internal/process/next_tick.js:169:7)
  </code></pre>
  
  <p>I have tried: </p>
  
  <ul>
  <li>downgrading the babel.</li>
  <li>upgrading the react-native and react.</li>
  <li>reinstalling everything.</li>
  <li>throwing the computer out of the window.</li>
  </ul>
  
  <p>Unfortunately, none of them helped.</p>