更新 npm start 后的 Angular cli 出现错误

我使用 angular cli 创建应用程序并使用后端代理处理后端并使用聚合物(vaadin)它可以正常工作，直到我更新到 angular cli 1.0.0-beta.22 它给出错误

I create application using angular cli and use backend proxy to handle backend and using polymer(vaadin) it work correctly until I update to angular cli 1.0.0-beta.22 it give Error

Tried to find bootstrap code, but could not. Specify either statically analyzable bootstrap code or pass in an entryModule to the plugins options.

proxy.conf.json

{
  "/api": {
    "target": "http://127.0.0.1:3000",
    "secure": false
  }
}

ma​​in-polymer.ts

document.addEventListener('WebComponentsReady', () => {
  require('./main.ts');
});

ma​​in.ts

import './polyfills.ts';

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { environment } from './environments/environment';
import { AppModule } from './app/';

if (environment.production) {
  enableProdMode();
}

// platformBrowserDynamic().bootstrapModule(AppModule);
platformBrowserDynamic().bootstrapModule(AppModule);

我该如何纠正?