wx.cloud.CDN中写filePath: res.tempFilePaths,会报错：Error: cloud.callFunction:fail undefined . uploadToCommonCDN:fail e.replace is not a function

但如果直接写地址filePath: "http://tmp/gZyPniZcHkHod7cccc7faaf5d114fdb2a6ad6dcac05f.jpeg",可以正常返回结果

代码如下：

    wx.chooseImage({
      count: 1,
      sizeType: ['compressed'],
      sourceType: ['album', 'camera'],
      success (res) {
        console.log(res.tempFilePaths)
        wx.cloud.callFunction({
          name:'ocrIdcard',
          data: {
            imgUrl: wx.cloud.CDN({
              type: 'filePath',
              filePath: res.tempFilePaths,
            })
          },
          complete:res=>{
            console.log(res)
          }
        })

请各位大佬帮忙看看是哪里有问题啊？