Fatal error: Uncaught Error: Class "Magento\Banner\Block\Adminhtml\Promo\Salesrule\Widget\Grid\Serializer" not found in /var/www/magento/html/generated/code/Magento/Banner/Block/Adminhtml/Promo/Salesrule/Widget/Grid/Serializer/Interceptor.php:7 Stack trace: #0 {main} thrown in /var/www/magento/html/generated/code/Magento/Banner/Block/Adminhtml/Promo/Salesrule/Widget/Grid/Serializer/Interceptor.php on line 7