Fatal error: Uncaught Error: Class "Amasty\Rules\Model\Rule\Action\Discount\AbstractRule" not found in /var/www/magento/html/app/code/Amasty/Rules/Model/Rule/Action/Discount/GroupnDisc.php:19
Stack trace:
#0 {main}
thrown in /var/www/magento/html/app/code/Amasty/Rules/Model/Rule/Action/Discount/GroupnDisc.php on line 19