title: ModX gives me empty page of my document
body: <p>I have Document- <code>"news"</code>, where are a lot of <code>articles</code>(children documents), if I click on some article, ModX gives me empty page with the current <code>alias</code> name in url. Error Log shows me </p>
  
  <pre><code>[2015-09-02 17:06:38] (ERROR @ /index.php) Could not retrieve data to cache for resource 466
  [2015-09-02 17:06:40] (ERROR @ /index.php) Could not retrieve data to cache for resource 466
  </code></pre>
  
  <p>resource 466- this is my article. What can I do to solve this problem? 
  P.S. I have already deleted all cache files(by my hands). On my local server all is OK! Templates are the same on web server and on my local... 
   Thank you. </p>