手机、开发者工具都能打开，但是pc端微信小程序无法打开，进入fail，显示：{”errMsg“:"downloadFile:fail createDownloadTask:fail"}

wx.downloadFile({
        url: app.getApi('qs/export-word?id=1'),
        header: {
          'content-type': 'application/json', // 默认值
          'X-Api-Key': app.globalData.access_token
        },
        success(res) {
          if (res.statusCode === 200) {
            wx.showToast({
              title: '下载成功',
            });
            wx.openDocument({
              filePath: res.tempFilePath,
              fileType: "docx",
            });
          }else{
            wx.showToast({
              title: '下载失败',
              icon: 'error'
            });
          }
          wx.hideLoading({
            success: (res) => {},
          });
        },
        fail(res){
          wx.showToast({
            icon: 'none',
            title: JSON.stringify(err)
          })
        }
      })