合单下单-JSAPI支付/小程序支付API这个版本的证书需要升级吗？用V2的证书可以吗？ <xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[XML格式错误]]></return_msg> <combine_appid><![CDATA[]]></combine_appid> <combine_mch_id><![CDATA[]]></combine_mch_id> <nonce_str><![CDATA[LqJZ7bgcqkbcbcMq]]></nonce_str> </xml> 这边一直返回XML格式错误

{ "combine_appid":"wx0f3034714a7186cf", "combine_mchid":"1531389481", "combine_out_trade_no":"LBZHD16039580216334638", "combine_payer_info":{ "openid":"oC1HU5Fa4SKPnEepd78Wfbdko2p0" }, "notify_url":"https://cloud.xx.com/pay/wxLbHbPayNotifyRes", "scene_info":{ "device_id":"POS1:1", "payer_client_ip":"223.104.170.106" }, "sub_orders":[ { "amount":{ "currency":"CNY", "total_amount":1 }, "attach":"合单商户", "description":"路内停车缴费", "mchid":"1545505541", "out_trade_no":"LBHD16039580216242239", "sub_mchid":"1545505541" }, { "amount":{ "currency":"CNY", "total_amount":1 }, "attach":"合单商户", "description":"路内停车缴费", "mchid":"1545505541", "out_trade_no":"LBHD16039580216336846", "sub_mchid":"1545505541" } ], "time_expire":"2020-10-29T16:23:41+08:00", "time_start":"2020-10-29T15:53:41+08:00" } 还有这个问题 [图片]