title: What causes these 'not defined by the user' errors?
body: <p>Why I get these errors? </p>
  
  <pre><code>&lt;! [CDATA [An error occurred on the server: not defined by the user]]&gt;
      #status# HTTP / 1.1 500 internal server Error
  
  
  &lt;! [ CDATA [ An error occurred on the server: not defined by the user]]&gt; 
      #status#  HTTP / 1.1 500 internal server Error
  </code></pre>