Fatal error: Uncaught Error: Class "Magento\Reward\Model\System\Config\Backend\Expiration" not found in /var/www/magento/html/generated/code/Magento/Reward/Model/System/Config/Backend/Expiration/Interceptor.php:7 Stack trace: #0 {main} thrown in /var/www/magento/html/generated/code/Magento/Reward/Model/System/Config/Backend/Expiration/Interceptor.php on line 7