« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: Invalid argument supplied for foreach() 
  Error type/ Nr.: Warning - 2 
  File: /var/www/html/httpdocs/manager/includes/document.parser.class.inc.php 
  Line: 1893 
  Line 1893 source: foreach ($this->documentMap as $mapEntry) {  
 
Parser timing
  MySQL: 0.0005 s(0 Requests)
  PHP: 0.0249 s 
  Total: 0.0254 s