求助，运行build后的项目，发起异步actoin时，提示没有使用中间件

#1

build之前运行是没问题的，
用serve运行起来后，发起一个异步action就报这样的错误，
用的中间件是redux-thunk。
报错信息：

Uncaught Error: Actions must be plain objects. Use custom middleware for async actions.
    at Object.performAction (<anonymous>:1:40685)
    at liftAction (<anonymous>:1:34238)
    at dispatch (<anonymous>:1:38232)
    at Object.getSingleSearchResult (index.jsx:207)
    at t.value (index.jsx:44)
    at fa (react-dom.production.min.js:5065)
    at da (react-dom.production.min.js:4826)
    at ca (react-dom.production.min.js:4800)
    at va (react-dom.production.min.js:5202)
    at En (react-dom.production.min.js:1737)`

store.js文件

import { createStore, applyMiddleware, compose } from 'redux';
import reducer from './reducer/';
import thunk from 'redux-thunk';

const win = window;

const middlewares = [];
if (process.env.NODE_ENV !== 'production') {
  middlewares.push(thunk);
}

const storeEnhancers = compose(
  applyMiddleware(...middlewares),
  (win && win.devToolsExtension) ? win.devToolsExtension() : (f) => f
);

export default createStore(reducer, storeEnhancers);

项目地址：项目地址

请问是什么原因？？求大神相助。