Fatal error: Uncaught Error: Class "Magento\SalesRule\Model\Rule\Action\Discount\AbstractDiscount" not found in /var/www/magento/html/app/code/Amasty/Rules/Model/Rule/Action/Discount/AbstractRule.php:23 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Amasty/Rules/Model/Rule/Action/Discount/AbstractRule.php on line 23