jos-Error: Unable to load renderer class

JSite -> dispatch() @ /home/national/public_html/index.php:42
JComponentHelper :: renderComponent() @ /home/national/public_html/includes/application.php:194
JComponentHelper :: executeComponent() @ /home/national/public_html/libraries/joomla/application/component/helper.php:348
require_once() @ /home/national/public_html/libraries/joomla/application/component/helper.php:380
JError :: raiseError() @ /home/national/public_html/components/com_k2/k2.php:68
JError :: raise() @ /home/national/public_html/libraries/joomla/error/error.php:251
JError :: throwError() @ /home/national/public_html/libraries/joomla/error/error.php:176
call_user_func_array() @ /home/national/public_html/libraries/joomla/error/error.php:214
JError :: handleCallback()
call_user_func() @ /home/national/public_html/libraries/joomla/error/error.php:765
plgSystemRedirect :: handleError()
JError :: customErrorPage() @ /home/national/public_html/plugins/system/redirect/redirect.php:104
JDocumentError -> render() @ /home/national/public_html/libraries/joomla/error/error.php:804
JDocumentError -> _loadTemplate() @ /home/national/public_html/libraries/joomla/document/error/error.php:107
require_once() @ /home/national/public_html/libraries/joomla/document/error/error.php:135
Gantry -> displayModules() @ /home/national/public_html/templates/rt_clarion_responsive/error.php:44
GantryModulesRenderer :: display() @ /home/national/public_html/libraries/gantry/core/gantry.class.php:867
GantryFeatureFusionMenu -> render() @ /home/national/public_html/libraries/gantry/core/renderers/gantrymodulesrenderer.class.php:65
JDocument -> loadRenderer() @ /home/national/public_html/templates/rt_clarion_responsive/features/fusionmenu.php:46
JError :: raiseError() @ /home/national/public_html/libraries/joomla/document/document.php:926
JError :: raise() @ /home/national/public_html/libraries/joomla/error/error.php:251