« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: Only variables should be passed by reference 
  Error type/ Nr.: - 2048 
  File: /nfs/c05/h03/mnt/7065/domains/ghanaeducationproject.org.uk/html/assets/snippets/FeedX/classes/feedx.class.inc.php 
  Line: 239 
  Line 239 source: $out = $this->render($child['children'], $chunks, file_get_contents($this->config['feedxPath'] . 'tpl/' . $this->config['preset'] . '/' . $tplName . '.tpl'), $depth+1); // Render a file  
 
Parser timing
  MySQL: 0.0570 s(4 Requests)
  PHP: 2.7643 s 
  Total: 2.8213 s