Fatal error: Uncaught Error: Class 'SmartSorting' not found in /home/lungjyic/opencart/storage/modification/catalog/controller/product/category.php:28 Stack trace: #0 /home/lungjyic/opencart/storage/modification/system/engine/action.php(79): ControllerProductCategory->index() #1 /home/lungjyic/public_html/catalog/controller/startup/router.php(25): Action->execute(Object(Registry)) #2 /home/lungjyic/opencart/storage/modification/system/engine/action.php(79): ControllerStartupRouter->index() #3 /home/lungjyic/opencart/storage/modification/system/engine/router.php(120): Action->execute(Object(Registry)) #4 /home/lungjyic/opencart/storage/modification/system/engine/router.php(109): Router->execute(Object(Action)) #5 /home/lungjyic/public_html/system/framework.php(174): Router->dispatch(Object(Action), Object(Action)) #6 /home/lungjyic/public_html/system/startup.php(104): require_once('/home/lungjyic/...') #7 /home/lungjyic/public_html/index.php(19): start('catalog') #8 {main} thrown in /home/lungjyic/opencart/storage/modification/catalog/controller/product/category.php on line 28