Fatal error: Uncaught Error: Interface "Fusion\Orderapi\Api\Data\SalesOrderExtraDataInterface" not found in /var/www/magento/html/app/code/Fusion/Orderapi/Model/Sales/SalesOrderExtra.php:17 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Fusion/Orderapi/Model/Sales/SalesOrderExtra.php on line 17