Error: Uncaught (in promise): Error: Cannot match any routes Angular 2

Question

##Error I have implemented nested routing in my app. when application loads its shows login screen after login its redirects to admin page where further child routes exist like user, product, api etc. now when I navigate to admin it by default loads user screen but further <routeLinks> not working and its shows this error. Error: Uncaught (in promise): Error: Cannot match any routes: 'product'

After Click Product it shows this

##Code main.ts

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { APP_ROUTER_PROVIDERS } from '../app/app.routes';
import { AppComponent } from '../app/app.component';

bootstrap(AppComponent, [APP_ROUTER_PROVIDERS]);

##app.component

import { Component } from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';

@Component({
  selector: 'demo-app',
  template: `

    <div class="outer-outlet">
      <router-outlet></router-outlet>
    </div>
  `,
  directives: [ROUTER_DIRECTIVES]
})
export class AppComponent { }

##app.routes

import { provideRouter, RouterConfig } from '@angular/router';

import { AboutComponent, AboutHomeComponent, AboutItemComponent } from '../app/about.component';
import { HomeComponent } from '../app/home.component';

export const routes: RouterConfig = [
  { 
    path: '', 
    component: HomeComponent
   },
  {
    path: 'admin',
    component: AboutComponent,
    children: [
      { 
        path: '', 
        component: AboutHomeComponent
       },
      { 
        path: '/product', 
        component: AboutItemComponent 
      }
    ]
  }
];

export const APP_ROUTER_PROVIDERS = [
  provideRouter(routes)
];

##home.component

import { Component } from '@angular/core';

@Component({
  selector: 'app-home',
  templateUrl:'../app/layouts/login.html'
})
export class HomeComponent { }

##about.component

import { Component } from '@angular/core';
import { ActivatedRoute, ROUTER_DIRECTIVES } from '@angular/router';

@Component({
  selector: 'about-home',
  template: `<h3>user</h3>`
})
export class AboutHomeComponent { }

@Component({
  selector: 'about-item',
  template: `<h3>product</h3>`
})
export class AboutItemComponent { }

@Component({
    selector: 'app-about',
    templateUrl: '../app/layouts/admin.html',
    directives: [ROUTER_DIRECTIVES]
})
export class AboutComponent { }
      

Answer 1

I think that your mistake is in that your route should be product instead of /product.

So more something like

  children: [
  { 
    path: '', 
    component: AboutHomeComponent
   },
   { 
    path: 'product', 
    component: AboutItemComponent 
   }
 ]