调用微信合单支付api：https://api.mch.weixin.qq.com/v3/combine-transactions/native，提示：商户号该产品权限未开通，请前往商户平台>产品中心检查后重试。

可我在商户平台开通了native，并且在公众号和商户号都相互关联了。这个问题怎么解决？

请求参数：

【请求地址】：https://api.mch.weixin.qq.com/v3/combine-transactions/native

【请求数据】：{"combine_appid":"wxb16*******9d3","combine_mchid":"169*****38","combine_out_trade_no":"9400a4ef6a3840289f0f94f599b5ed20","scene_info":{"payer_client_ip":"14.17.22.32"},"sub_orders":[{"mchid":"169*****38","attach":"趣行部落","amount":{"total_amount":10,"currency":"CNY"},"out_trade_no":"b301409e763c4800aa72068371e3ddcb","description":"路线金额"},{"mchid":"169*****38","attach":"永**代","amount":{"total_amount":1,"currency":"CNY"},"out_trade_no":"e6021e399fa14e47925aa221c60d01a8","description":"保费"}],"notify_url":"https://sit.*****.com/app-api/app/order/update-paid"}

【异常信息】：商户号该产品权限未开通，请前往商户平台>产品中心检查后重试