angular – 调用函数SocialLoginModule,不支持函数调用.用引用替

从工作空间保存任何文件后,它会编译所有项目文件,这次它运行良好.
我不明白为什么会这样.你能帮助我摆脱这个吗？请在下面找到相同的图像.

Please find below app.module.ts file

    import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { RouterModule } from '@angular/router';
import { SocialLoginModule,AuthServiceConfig,GoogleLoginProvider,FacebookLoginProvider } from "angular4-social-login";
import { StarRatingModule } from 'angular-star-rating';
import { AppComponent } from './app.component';
import { LandingPageComponent } from './landing-page/landing-page.component';
import { AppHeaderComponent } from './app-header/app-header.component';
let config = new AuthServiceConfig([
  {
    id: GoogleLoginProvider.PROVIDER_ID,provider: new GoogleLoginProvider("")
  },{
    id: FacebookLoginProvider.PROVIDER_ID,provider: new FacebookLoginProvider("")
  }
]);
export function provideConfig() {
  return config;
}
@NgModule({
  declarations: [
    AppComponent,LandingPageComponent,AppHeaderComponent
  ],imports: [
    BrowserModule,FormsModule,HttpModule,StarRatingModule.forRoot(),RouterModule.forRoot([
      { path: 'landing',component: LandingPageComponent },{ path: '',redirectTo: 'landing',pathMatch: 'full' }
    ]),SocialLoginModule.initialize(config)
  ],providers: [{
    provide: AuthServiceConfig,useFactory: provideConfig
  }],bootstrap: [AppComponent]
})
export class AppModule { }