title: Error: Could not build Objective-C module 'Firebase'
body: <p>When I compile the application I get an error equal to this:</p>
  
  <blockquote>
    <p>Could not build Objective-C module 'Firebase'</p>
  </blockquote>
  
  <p>This error appear in <code>import Firebase</code> of my file swift.</p>