jos-Error: Unable to load renderer class

JSite -> dispatch() @ /var/www/html/quito/index.php:42
JComponentHelper :: renderComponent() @ /var/www/html/quito/includes/application.php:197
JError :: raiseError() @ /var/www/html/quito/libraries/joomla/application/component/helper.php:304
JError :: raise() @ /var/www/html/quito/libraries/joomla/error/error.php:251
JError :: throwError() @ /var/www/html/quito/libraries/joomla/error/error.php:176
call_user_func_array() @ /var/www/html/quito/libraries/joomla/error/error.php:214
JError :: handleCallback()
call_user_func() @ /var/www/html/quito/libraries/joomla/error/error.php:765
plgSystemQlue404 :: handleError()
JDocumentFeed -> render() @ /var/www/html/quito/plugins/system/qlue404/qlue404.php:300
JDocument -> loadRenderer() @ /var/www/html/quito/libraries/joomla/document/feed/feed.php:201
JError :: raiseError() @ /var/www/html/quito/libraries/joomla/document/document.php:926
JError :: raise() @ /var/www/html/quito/libraries/joomla/error/error.php:251