[SOLVED] Screen customization plugin Error

Warning: require_once(_securityCheck.php): Failed to open stream: No such file or directory in /var/www/html/model/custom/Client.php on line 30 Warning: session_start(): Failed to decode session object. Session has been destroyed in /var/www/html/tool/projeqtor.php on line 46 Fatal error: Uncaught Error: Failed opening required '_securityCheck.php' (include_path='.:/usr/share/pear:/usr/share/php:/usr/share/pear:/usr/share/php') in /var/www/html/model/custom/Client.php:30 Stack trace: #0 /var/www/html/tool/projeqtor.php(1809): require_once() #1 [internal function]: projeqtorAutoload() #2 /var/www/html/tool/projeqtor.php(46): session_start() #3 /var/www/html/plugin/screenCustomization/screenCustomizationFields.php(27): require_once('...') #4 {main} thrown in /var/www/html/model/custom/Client.php on line 30