Fatal error: Uncaught Error: Class "Magento\Backend\Block\Widget\Grid\Massaction\Item\Additional\DefaultAdditional" not found in /var/www/magento/html/generated/code/Magento/Backend/Block/Widget/Grid/Massaction/Item/Additional/DefaultAdditional/Interceptor.php:7 Stack trace: #0 {main} thrown in /var/www/magento/html/generated/code/Magento/Backend/Block/Widget/Grid/Massaction/Item/Additional/DefaultAdditional/Interceptor.php on line 7