问ionic5白屏。为什么没有加载tabs.ts？

EN

<feature name="CDVWKWebViewEngine">
        <param name="ios-package" value="CDVWKWebViewEngine" />
    </feature>
    <preference name="CordovaWebViewEngine" value="CDVWKWebViewEngine" />
    <preference name="DisallowOverscroll" value="true" />
    <preference name="AllowedSchemes" value="netspay" />
    <preference name="ScrollEnabled" value="false" />
    <preference name="android-minSdkVersion" value="19" />
    <preference name="BackupWebStorage" value="none" />
    <preference name="ShowSplashScreen" value="true" />
    <preference name="SplashScreen" value="screen" />
    <preference name="SplashScreenDelay" value="3000" />
    <preference name="AutoHideSplashScreen" value="false" />
    <preference name="SplashMaintainAspectRatio" value="true" />
    <preference name="ShowSplashScreenSpinner" value="false" />
    <preference name="FadeSplashScreenDuration" value="1000" />
    <preference name="SplashShowOnlyFirstTime" value="false" />
    <preference name="Orientation" value="portrait" />

initializeApp() {
    this.platform.ready().then(() => {
      // this.statusBar.styleDefault();
      this.statusBar.backgroundColorByHexString('#27507E');
      setTimeout(() => {
        this.splashScreen.hide();
      }, 2000);
    });
}

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

const routes: Routes = [
  {
    path: '',
    loadChildren: () => import('./tabs/tabs.module').then(m => m.TabsPageModule)
  },
  {
    path: 'products',
    loadChildren: () => import('./pages/products/products.module').then( m => m.ProductsPageModule)
  },
  {
    path: 'proDetail',
    loadChildren: () => import('./pages/proDetail/proDetail.module').then( m => m.ProDetailPageModule)
  },
  {
    path: 'cartPage',
    loadChildren: () => import('./pages/cartPage/cartPage.module').then( m => m.CartPageModule)
  },
  {
    path: 'orderDetail',
    loadChildren: () => import('./pages/orderDetail/orderDetail.module').then( m => m.OrderDetailPageModule)
  },
  {
    path: 'payment',
    loadChildren: () => import('./pages/payment/payment.module').then( m => m.PaymentPageModule)
  },
  {
    path: 'receipt',
    loadChildren: () => import('./pages/receipt/receipt.module').then( m => m.ReceiptPageModule)
  },
  {
    path: 'setting',
    loadChildren: () => import('./pages/setting/setting.module').then( m => m.SettingPageModule)
  },
  {
    path: 'notification',
    loadChildren: () => import('./pages/notification/notification.module').then( m => m.NotificationPageModule)
  },
  {
    path: 'scanner',
    loadChildren: () => import('./pages/home/scanner/scanner.module').then( m => m.ScannerPageModule)
  },
];
@NgModule({
  imports: [
    RouterModule.forRoot(routes, { preloadingStrategy: PreloadAllModules })
  ],
  exports: [RouterModule]
})
export class AppRoutingModule {}

ngOnInit(): void {
    console.log('page load');
  }