« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: Cannot modify header information - headers already sent by (output started at /home/s/sidorova72/public_html/index.php:5) 
  Error type/ Nr.: Warning - 2 
  File: /home/s/sidorova72/public_html/manager/includes/document.parser.class.inc.php(821) : eval()'d code 
  Line: 2 
 
Parser timing
  MySQL: 0,0137 s(3 Requests)
  PHP: 0,0337 s 
  Total: 0,0474 s