For your information, I find there is an error on
Uncaught Error: only one instance of babel-polyfill is allowed
at Object.<anonymous> (bundle.js:1)
at Object.<anonymous> (bundle.js:1)
at r (bundle.js:1)
at Module.<anonymous> (bundle.js:1)
at r (bundle.js:1)
at Object.<anonymous> (bundle.js:1)
at r (bundle.js:1)
at bundle.js:1
at bundle.js:1
Failed to load resource: net::ERR_ADDRESS_INVALID