孩子路由不工作和应用程序重定向到404页面

我创建了一个角度应用程序版本7，项目结构是这样的 . app模块有app-routing.module.ts和仪表板模块有dashboard-routing module.ts . 在仪表板模块中，布局组件路径具有子组件，即home和admin .

Here is my code:

AppModule

import { AppRoutingModule } from './app-routing.module';
import { DashboardModule } from './dashboard/dashboard.module';

import { AppComponent } from './app.component';
import { LoginComponent } from './login/login.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';


@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    PageNotFoundComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    DashboardModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

App-routing module:

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { LoginComponent } from './login/login.component';
import { PageNotFoundComponent } from './page-not-found/page-not-found.component';

const routes: Routes = [
  { path: 'login', component: LoginComponent },
  { path: '', redirectTo: 'dashboard', pathMatch: 'full' },
  { path: '**', component: PageNotFoundComponent }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

dashboard module file:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { LayoutComponent } from './layout/layout.component';
import { HomeComponent } from './home/home.component';
import { AdminComponent } from './admin/admin.component';
import { DashboardRoutingModule } from './dashboard-routing.module';

@NgModule({
  declarations: [LayoutComponent, HomeComponent, AdminComponent],
  imports: [
    CommonModule,
    DashboardRoutingModule
  ]
})
export class DashboardModule { }

dashboard-routing module.

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Routes, RouterModule } from '@angular/router';

import { LayoutComponent } from './layout/layout.component';
import { HomeComponent } from './home/home.component';
import { AdminComponent } from './admin/admin.component';


const dashboardRoutes: Routes = [
  {
    path: 'dashboard',
    component: LayoutComponent,
    children: [
      { path: '', redirectTo: 'home', pathMatch: 'full' },
      { path: 'home', component: HomeComponent },
      { path: 'admin', component: AdminComponent}
    ]
  }
];

@NgModule({
  declarations: [],
  imports: [
    CommonModule,
    RouterModule.forChild(dashboardRoutes)
  ],
  exports: [RouterModule]
})
export class DashboardRoutingModule { }

问题是我想在localhost：4200上路由到仪表板布局，但它总是在每个路由上转到pageNotFound组件路由 . 任何人都可以指出问题是什么 .

Code on StackBlitz:

https://stackblitz.com/github/Ahsan9981/authGuardApp

Desired output