title: Unable to run app in Simulator XCode 6.0
body: <p>After migrating from XCode 5.0 to XCode 6.0 the project fails to run with the following error.</p>
  
  <pre><code>An error was encountered while running (Domain = FBSOpenApplicationErrorDomain,
  Code = 4)
  </code></pre>
  
  <p>Any suggestions?</p>
  
  <p><img src="https://i.stack.imgur.com/IsqBR.png" alt="Screenshot"></p>