title: NSURLErrorDomain error code -999 in iOS
body: <p>I've been trying to use Corona SDK's Facebook API to post the score on the game I'm developing on facebook. However, I'm having a problem with it. During the first time I try to post to facebook, I get this error after login and user authentication:</p>
  
  <blockquote>
    <p>NSURLErrorDomain error code -999</p>
  </blockquote>
  
  <p>Then, it won't post on facebook. What are possible causes of this error and how can I address it? I tried searching the web but couldn't find information about it. Thanks in advance.</p>
  
  <p>By the way, I am not using webview on my app. Just the widget api and a show_dialog listener in my Facebook class.</p>