小程序通过<web/view>调取微信公众号的人脸识别，但是报错err_msg:"system:access_denied",

wx.invoke("requestWxFacePictureVerify", {

                        "request_verify_pre_info":

"{\"name\": \"张三\", \"id_card_number\": \"320821199600000000\", \"mobile\":\"15800000000\"}"

                    }, function (res) {

                        alert(JSON.stringify("结果：" + JSON.stringify(res)))

                    });