Solo estoy tratando de ejecutar una página index.html simple enAngular2, pero me muestra un error en zone.js en la consola:

    Unhandled Promise rejection: No ErrorHandler. Is platform module (BrowserModule) included? ; Zone: <root> ; Task: Promise.then ; Value: Error: No ErrorHandler. Is platform module (BrowserModule) included?
    at eval (application_ref.ts:364)
    at ZoneDelegate.invoke (zone.js:391)
    at Object.onInvoke (ng_zone.ts:296)
    at ZoneDelegate.invoke (zone.js:390)
    at Zone.run (zone.js:141)
    at NgZone.run (ng_zone.ts:153)
    at PlatformRef_._bootstrapModuleFactoryWithZone (application_ref.ts:359)
    at eval (application_ref.ts:330)
    at ZoneDelegate.invoke (zone.js:391)
    at Zone.run (zone.js:141) Error: No ErrorHandler. Is platform module (BrowserModule) included?
    at eval (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:4531:23)
    at ZoneDelegate.invoke (http://localhost:3000/node_modules/zone.js/dist/zone.js:391:26)
    at Object.onInvoke (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:3922:33)
    at ZoneDelegate.invoke (http://localhost:3000/node_modules/zone.js/dist/zone.js:390:32)
    at Zone.run (http://localhost:3000/node_modules/zone.js/dist/zone.js:141:43)
    at NgZone.run (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:3853:69)
    at PlatformRef_._bootstrapModuleFactoryWithZone (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:4526:23)
    at eval (http://localhost:3000/node_modules/@angular/core/bundles/core.umd.js:4568:59)
    at ZoneDelegate.invoke (http://localhost:3000/node_modules/zone.js/dist/zone.js:391:26)
    at Zone.run (http://localhost:3000/node_modules/zone.js/dist/zone.js:141:43)

¿Alguien puede ayudarme básicamente qué es y cómo solucionarlo? Archivo de módulo:

import {Component, NgModule} from "@angular/core";
import {App} from "./app";

@NgModule({
    declarations: [App],
    bootstrap: [App]
})
export class AppModule {

}