请问下Can’t resolve ‘babel’这是什么原因，根据网上所说的调试方法均未成功

ERROR in multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server webpack/hot/dev-server.js ./app/main.js Module not found: Error: Can't resolve 'babel' in 'C:\GitHub\WebPack-React' @ multi (webpack)-dev-server/client?http://localhost:8080 webpack/hot/dev-server webpack/hot/dev-server.js ./app/main.js 请万能的大神们帮忙调试下 附上github

https://github.com/Winux-R/WebPack-React