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Fatal error: Uncaught Error: Class "QuantityDiscountRule" not found in /home/smartgradepro/staging_smartgradepro_public_html/override/classes/CartRule.php:34 Stack trace: #0 /home/smartgradepro/staging_smartgradepro_public_html/classes/controller/FrontController.php(492): CartRule::autoRemoveFromCart(Object(Context)) #1 /home/smartgradepro/staging_smartgradepro_public_html/controllers/front/listing/CategoryController.php(81): FrontControllerCore->init() #2 /home/smartgradepro/staging_smartgradepro_public_html/override/controllers/front/listing/CategoryController.php(19): CategoryControllerCore->init() #3 /home/smartgradepro/staging_smartgradepro_public_html/classes/controller/Controller.php(300): CategoryController->init() #4 /home/smartgradepro/staging_smartgradepro_public_html/classes/Dispatcher.php(510): ControllerCore->run() #5 /home/smartgradepro/staging_smartgradepro_public_html/index.php(29): DispatcherCore->dispatch() #6 {main} thrown in /home/smartgradepro/staging_smartgradepro_public_html/override/classes/CartRule.php on line 34