Angular 2 - （SystemJS）无法解析AppComponent的所有参数：（？，？）。（...）

Question

我试图建立一个应用程序，我在遇到障碍后遇到障碍，就在我认为我突破时，我不会。现在，一旦我引入了ng2-charts.js，曾经接受过AppComponent的应用程序现在却没有。我收到此错误：

我使用System.js和Node.js来运行此应用程序。我已卸载并重新安装了我的节点模块文件夹。这是我的app.module.ts和我的app.component.ts文件：

app.module.ts

import {NgModule} from "@angular/core";
import {BrowserModule} from "@angular/platform-browser";
import {FormsModule} from "@angular/forms";
import {HttpModule} from "@angular/http";
import {AppComponent} from "./app.component";
import TwitterService from "./twitter.service";
import BarGraphComponent from "./bar-graph.component";
import LineGraphComponent from "./line-graph.component";
import { ChartsModule } from "ng2-charts";
import {DataService} from "./data.service";

@NgModule({
    imports: [BrowserModule, FormsModule, HttpModule, ChartsModule ],
    declarations: [AppComponent, BarGraphComponent, LineGraphComponent],
    bootstrap: [AppComponent],
    providers: [TwitterService, DataService]
})
export default class AppModule { }

app.component.ts

import {Component, OnInit} from "@angular/core";
import * as io from "socket.io-client";
import {DataService} from "./data.service";
import TwitterService from "./twitter.service";
import {IoToken} from "./di";

@Component({
    selector: "app",
    templateUrl: "/app/app.component.html",
    providers: [TwitterService, DataService, {provide: IoToken, useValue: io}]
})

export class AppComponent implements OnInit {

    constructor(private twitter: TwitterService, private data: DataService) {}

    topWords = this.data.topWords;
    topWordsCount = this.data.topWordsCount;
    topHashtags = this.data.topHashtags;
    topHashtagsCount = this.data.topHashtagsCount;
    tweets = this.data.tweets;
    tweetsOverTime = this.data.tweetsOverTime;

    getTweetCount = () => this.data.totalCount;

    ngOnInit(){
        this.data.setSource(this.twitter.startStreaming());
    }
}

应该注意socket.io在子组件中使用并在子组件中声明，但我注释掉子组件中的代码以确保这不是问题。任何有关这方面的帮助将不胜感激。