Angular 6 angular-cli构建工作，build --prod失败

Question

使用ng build或ng serve时可以很好地工作，但是将ng build --prod与空白一起使用时会出错并给出错误

未捕获的错误：StaticInjectorError [t-> t]： StaticInjectorError（平台：核心）[t-> t]： NullInjectorError：没有t的提供者！

带有警告，无效的属性名称“ filter”位于3032：2。 在构建时忽略控制台

这是我的 app.module.ts

import { NgModule } from '@angular/core';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { EasyUIModule } from 'ng-easyui/components/easyui/easyui.module';
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { UserComponent } from './pages/user/user.component';
import { HttpClientModule } from '@angular/common/http';
import { CookieService } from 'ngx-cookie-service';
import { MainComponent } from './layout/main/main.component';
import { LoginComponent } from './layout/login/login.component';
import { Router, NavigationEnd } from "@angular/router";
import { CookieService as SessionCookie } from "angular2-cookie/services/cookies.service";
import { JwtHelperService } from '@auth0/angular-jwt';
import { DashboardComponent } from './pages/dashboard/dashboard.component';
import { GlobalService } from "./global.service";
import { UserService } from "./pages/user/user.service";

@NgModule({
  bootstrap: [
    AppComponent
  ],
  declarations: [
    AppComponent,
    UserComponent,
    MainComponent,
    LoginComponent,
    DashboardComponent,
  ],
  providers: [SessionCookie, CookieService, JwtHelperService, UserService, GlobalService],
  imports: [
    FormsModule,
    ReactiveFormsModule,
    BrowserModule,
    BrowserAnimationsModule,
    EasyUIModule,
    AppRoutingModule,
    HttpClientModule,
  ]
})


export class AppModule { 
  constructor(
    private router: Router,
    private global: GlobalService
    ){

  }
}