Fatal error: Uncaught Error: Interface "Magento\Framework\Data\OptionSourceInterface" not found in /var/www/magento/html/app/code/Amasty/Rules/Ui/Form/Rule/CalculateDiscountBasedOnOptions.php:17 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Amasty/Rules/Ui/Form/Rule/CalculateDiscountBasedOnOptions.php on line 17