Ivy preview report: error TS-996002: Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class

Hi! I try to build another compex project with Ivy and get an error:

ERROR in node_modules/ng6-breadcrumbs/lib/breadcrumbs.module.d.ts(1,22): error TS-996002: Appears in the NgModule.imports of AppModule,
 but could not be resolved to an NgModule class

All libs from NPM: https://www.npmjs.com/package/ng6-breadcrumbs

Angular CLI: 8.0.0
Node: 11.14.0
OS: win32 x64
Angular: 8.1.0-next.1
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router, service-worker

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.800.0
@angular-devkit/build-angular     0.800.0
@angular-devkit/build-optimizer   0.800.0
@angular-devkit/build-webpack     0.800.0
@angular-devkit/core              7.3.9
@angular-devkit/schematics        7.3.9
@angular/cli                      8.0.0
@angular/http                     7.2.13
@angular/pwa                      0.13.9
@ngtools/webpack                  8.0.0
@schematics/angular               7.3.9
@schematics/update                0.800.0
rxjs                              6.5.2
typescript                        3.4.5
webpack                           4.30.0

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent,
    NotFoundComponent,
    PublicComponent,
    PrivateComponent,
    HomeComponent,
    SidebarComponent,
    MobileSidebarToggleDirective,
    MobileSidebarCloseDirective,
    SidebarToggleDirective,
    SidebarCloseDirective,
    CloseDirective
  ],
  imports: [
    BrowserModule,
    ReactiveFormsModule,
    NgxPaginationModule,
    BreadcrumbsModule,
    HttpClientModule,
    /*Ng4LoadingSpinnerModule.forRoot(),*/
    NgxUiLoaderModule.forRoot({delay: 1500, maxTime: 10000}),
    // NgxUiLoaderHttpModule.forRoot({ delay: 1500, maxTime: 10000 }), // for Http module only
    AppRoutingModule,
    ServiceWorkerModule.register('ngsw-worker.js', {enabled: environment.production})
  ],
  providers: [
    {provide: HTTP_INTERCEPTORS, useClass: RequestInterceptorService, multi: true}
  ],
  bootstrap: [AppComponent]
})
export class AppModule {
}

Whats wrong?

[petebacondarwin]

@Phil147 - just to be clear, building libraries with IVY mode is not yet supported. You should still build your library with ViewEngine mode and publish it with ngpackagr. Then only run ngcc on the published package when it is being consumed in an app.

[petebacondarwin]

I’ll take a look.