问云开发上传图片问题，如何处理？

const app = require('../utils/tcb')
const shortid = require('shortid')
const { Buffer } = require('buffer')
const { PassThrough } = require('stream');

const uploader = async function(base64,param){
  const type = param.filetype
  const id = shortid.generate()
  const fileName = `${id}.${type}`
  const cloudPath = '/syh/'+fileName
  const bufferStream = new PassThrough()
  const buffer = Buffer.from(base64,'base64').toString('utf-8')
  bufferStream.end(buffer)
  const result = await app.uploadFile({
      cloudPath,
      fileContent: bufferStream
  })
  console.log('result', result)
  return result
}
module.exports = uploader

 //这是返回值
 {
 "code": "INTERNAL_REQUEST_FAIL",
 "message": "Error: get upload metadata failed: STORAGE_REQUEST_FAIL\n    at Tcb.getUploadMetadata (/var/user/node_modules/tcb-admin-node/src/storage/index.js:299:11)\n    at process._tickCallback (internal/process/next_tick.js:68:7)",
 "requestId": "6c3879f59a8a38da2fa060ec7b7e9845"
}