后端各种参数已经获取，在调用拉起支付功能时候 小程序无任何响应,未调用success,而是走了fail 和 complete，fail中未打印错误信息

wx.requestPayment(

        {

          "timeStamp": res.data.timeStamp,

          "nonceStr": res.data.nonce,

          "package": "prepay_id=" + res.data.prepayId,

          "signType": "RSA",

          "paySign": res.data.paySign,

          "success":function(res){

            console.log('支付完成!')

          },

          "fail":function(res){

            console.log('支付失败' + res )

          },

          "complete":function(res){

            console.log(res)

          }

        })