« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
PHP error debug
  Error: include_once(/var/www/vhosts/lattravel.lv/httpdocs/assets/snippets/jot/jot.class.inc.php) [function.include-once]: failed to open stream: Permission denied 
  Error type/ Nr.: Warning - 2 
  File: /var/www/vhosts/lattravel.lv/httpdocs/manager/includes/document.parser.class.inc.php(770) : eval()'d code 
  Line: 15 
Parser timing
  MySQL: 0.0805 s(13 Requests)
  PHP: 0.0881 s 
  Total: 0.1687 s 
Error while inserting event log into database.