title: Parse Login Unauthorized Error (code 0)
body: <p>I have an app using Parse, and am implementing Facebook login.  I believe I've put keys in every place they are required—three keys in the info.plist, the key and secret in Parse settings, and the bundle ID on Facebook Developer.  I am still getting an Error in the Xcode log saying "[Error]: unauthorized (Code: 0, Version: 1.6.3)".  Even using Facebook's code to test the connection causes this error.  </p>
  
  <p>Any ideas on what I could be overlooking that would cause this?</p>
  
  <p><strong>UPDATE</strong>
  I just realized this is happening for any kind of login—Twitter, Facebook, or even just the app's login.  They were previously working, and I don't believe I changed anything.</p>
  
  <p><strong>UPDATE</strong>
  This problem occurs on both the simulator and an actual device.</p>