在自定义交易组件的升级中，调用生成售后单接口https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/business-capabilities/ministore/minishopopencomponent2/API/aftersale/add_new.html返回 { "errcode": 2747002,     "errmsg": " 参数错误" } 小程序app_id:wxed6fc8dcb75dc2bb 请求参数格式：{     "out_order_id":"xxxxxxx",     "out_aftersale_id":"xxxxxxx",     "openid":"xxxxxxx",     "type":1,     "product_info":{            "out_product_id":"xxxxxxxx",         "out_sku_id":"xxxxxxxx",         "product_cnt":2     },     "refund_reason":"666656",     "refund_reason_type":1,     "orderamt":2 } 请问该如何解决?