运行代码时出现以下错误，并且不确定从哪里开始调试。
mapStateToProps() in Connect(EquipmentMetadata) must return a plain object. Instead received undefined.
Warning: Failed prop type: The prop name is marked as required in EquipmentMetadata, but its value is undefined.
这是索引文件：
mapStateToProps() in Connect(EquipmentMetadata) must return a plain object. Instead received undefined.
Warning: Failed prop type: The prop name is marked as required in EquipmentMetadata, but its value is undefined.
Run Code Online (Sandbox Code Playgroud)
import 'babel-polyfill'
import React from 'react'
import { render } from 'react-dom'
// import Root from './containers/Root'
import { setName …