« 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: /home/cancergrodno/public_html/manager/includes/document.parser.class.inc.php 
  Line: 1210 
  Line 1210 source: foreach ($this->documentMap as $mapEntry) {  
Parser timing
  MySQL: 0.0022 s(8 Requests)
  PHP: 0.1836 s 
  Total: 0.1858 s 
Error while inserting event log into database.