Import aws-amplify in Ionic2 - visual-studio

Question

OverView
I develop an ionic mobile app with Visual Studio.
When I added import statement in src/app/main.ts, my app got not working and didn't render expected page.
Please tell me how to solve this.
I published my app to github.
link to my github page
Process of my app not working
I installed aws-amplify by npm command.
$ npm install aws-amplify --save
I selected "Ionic 2 - Tabs" template and created new a project.
Visual Stido "Ionic 2 - Tabs"
I added import statement in src/app/main.ts.
import Amplify, { Auth } from 'aws-amplify';
My app got not working.
Error messages and ScreenShots
JavaScript Console shows messages below.
Failed to load resource: net::ERR_FILE_NOT_FOUND
main.css
Failed to load resource: net::ERR_FILE_NOT_FOUND
main.js
Failed to load resource: net::ERR_FILE_NOT_FOUND
polyfills.js
My app is expected to render the page below.
expected page
But it rendered the page below.
unexpected page

Answer 1

From the error it doesn't look like from aws-amplify. How about first try remove import from aws-amplify?
It more like the visual studio template has problem. I just tried command line it works fine.
ionic start myApp tabs
cd myApp
ionic serve
Here is an aws starter template maybe you could try follow.
https://github.com/ionic-team/starters/tree/master/ionic-angular/official/aws