chapter 6 (Flux)\aircheap is not working. #14

chapter 6 (Flux)\aircheap is not working.

i met the error that is 'RouteStore.js?1441:3 Uncaught TypeError: Super expression must either be null or a function, not undefined'

npm -version 2.15.9

this is the package.json

{
"name": "aircheap",
"version": "1.0.0",
"description": "",
"main": "webpack.config.js",
"scripts": {
"start": "webpack-dev-server --progress --port 9001",
"build": "NODE_ENV=production webpack -p --progress --colors"
},
"author": "",
"license": "ISC",
"devDependencies": {
"babel-core": "^6.17.0",
"babel-loader": "^6.2.5",
"babel-preset-es2015": "^6.16.0",
"babel-preset-react": "^6.16.0",
"webpack": "^1.13.2",
"webpack-dev-server": "^1.16.1"
},
"dependencies": {
"babel-polyfill": "^6.16.0",
"flux": "^3.0.0",
"react": "^15.3.2",
"react-autosuggest-legacy": "^2.2.6",
"react-dom": "^15.3.2",
"whatwg-fetch": "^1.0.0"
}
}