Error: Cannot match any routes. URL Segment: 'tabs'

in tabs.router.module.ts

remove the path:'tabs' under routes:Routes then the code will be like this. I am pasting the code from my file

const routes: Routes = [   {
    path: '',
    component: TabsPage,
    children: [
      {
        path: 'tab1',
        loadChildren: () => import('../tab1/tab1.module').then(m => m.Tab1PageModule)
      },
      {
        path: 'tab2',
        loadChildren: () => import('../tab2/tab2.module').then(m => m.Tab2PageModule)
      },
      {
        path: 'tab3',
        loadChildren: () => import('../tab3/tab3.module').then(m => m.Tab3PageModule)
      },
      {
        path: '',
        redirectTo: '/tabs/tab1',
        pathMatch: 'full'
      }
    ]   }, ];

in app-routing.module.ts the code will be like this

const routes: Routes = [    {
    path: 'login',
    loadChildren: () => import('./login/login.module').then( m => m.LoginPageModule)   },   {
    path: 'tabs',
    loadChildren: () => import('./tabs/tabs.module').then(m => m.TabsPageModule)   },      {
    path : '',
    redirectTo : 'login',
    pathMatch : 'full'   } ];

Replace these lines in tabs.router.module.ts

{
      path: '',
      redirectTo: '/tabs/tabs/(one:one)'
  }

You have to add '/tabs' before final redirect.