【即时配送】三方平台待商户调用达达预下单报错2001app_key无效？

接口：POST https://api.weixin.qq.com/cgi-bin/express/local/business/order/pre_add?access_token=ACCESS_TOKEN

数据类型：正式订单

响应：{"resultcode":2001,"resultmsg":"app_key无效","fee":0,"deliverfee":0,"tips":0,"insurancefee":0,"distance":0,"delivery_token":"","dispatch_duration":0}

配送平台：达达

使用测试数据也无法下单

测试数据：

达达测试号

• shopid: dadaaee18818d97e236
• appsecret: 1c6f40492d6d89caaad80b85f7d31670
• shopno: 77071-47913
• 支持变更状态: 102 201 202 301 302 304 305

求指教