Angular2：无法读取未定义的属性'vcRef'

Question

我使用Angular-cli进行初始代码设置。我需要整合 Angular 2：Toastr 库，但有些我无法使用。当我使用没有Angular-cli格式时它工作正常。我收到了以下错误。当我执行toast代码时。

error_handler.js:47 EXCEPTION: Uncaught (in promise): TypeError: Cannot read property 'vcRef' of undefined
TypeError: Cannot read property 'vcRef' of undefined
at http://localhost:4200/main.bundle.js:42306:101
at new ZoneAwarePromise (http://localhost:4200/main.bundle.js:63592:29)
at ToastsManager.show (http://localhost:4200/main.bundle.js:42297:16)
at ToastsManager.success (http://localhost:4200/main.bundle.js:42395:21)
at AppComponent.showSuccess (http://localhost:4200/main.bundle.js:41105:21)
at CompiledTemplate.proxyViewClass.View_AppComponent0.handleEvent_0 (/AppModule/AppComponent/component.ngfactory.js:34:34)
at CompiledTemplate.proxyViewClass.<anonymous> (http://localhost:4200/main.bundle.js:52326:37)
at HTMLButtonElement.<anonymous> (http://localhost:4200/main.bundle.js:27715:36)
at ZoneDelegate.invokeTask (http://localhost:4200/main.bundle.js:63339:35)
at Object.onInvokeTask (http://localhost:4200/main.bundle.js:25786:37)

我正在执行以下代码，

import {Component} from "@angular/core";
import { ToastsManager } from 'ng2-toastr/ng2-toastr';

@Component({
  selector: 'app-root',
  template: '<button class="btn btn-default" (click)="showSuccess()">Toastr Tester</button>'
})
export class AppComponent {

  constructor(public toastr: ToastsManager) {
  }

  showSuccess() {
    this.toastr.success('You are awesome!', 'Success!');
  }
}

Angular版本2.2.1

提前致谢。