Importing IonicModule in main.ts fixed my issue:
import { IonicModule } from '@ionic/angular' bootstrapApplication(AppComponent, { providers: [ { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }, provideIonicAngular(), provideRouter(routes, withPreloading(PreloadAllModules)), importProvidersFrom(IonicModule.forRoot({})) ], });