title: CakePHP showing blank page
body: <p>I have a website that is finished and uploaded, at first it works fine but after a while it stops working.</p>
  
  <p>By stops working I mean whatever page I go to just shows a blank page, empty source.</p>
  
  <p>In Chrome though, I get <code>HTTP Error 500 (Internal Server Error)</code></p>
  
  <p>To fix this all I need to do is change debug to 2, refresh and then change it back to 0.</p>
  
  <p>I do not know what triggers this to happen, I have tried clearing the cache folders.</p>
  
  <p>There are no log entries in /app/tmp/logs/error from the last week.</p>
  
  <p>Any ideas would be great. Thanks.</p>