Fatal error: Uncaught Error: Class "Magento\Framework\App\Helper\AbstractHelper" not found in /var/www/magento/html/app/code/Amasty/Rules/Helper/Discount.php:14 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Amasty/Rules/Helper/Discount.php on line 14