parse - error angular de ionic2 CloudModule.forRoot() no es función

mat icon is not a known element angular 6

Question

Intento configurar la nube iónica en mi aplicación, pero tengo este error: UnEught TypeError: angular.element no es una función (...) para esta línea:

 CloudModule.forRoot(cloudSettings)

mi código: para app.module.ts

import { NgModule, ErrorHandler } from ''@angular/core'';
import { IonicApp, IonicModule, IonicErrorHandler } from ''ionic-angular'';
import { CloudSettings, CloudModule } from ''@ionic/cloud-angular'';

import { MyApp } from ''./app.component'';
import { HomePage } from ''../pages/home/home'';
import {DetailsPage} from ''../pages/details/details'';
import {OtherPage} from ''../pages/other-page/other-page'';
import { Page1 } from ''../pages/page1/page1'';
import { Page2 } from ''../pages/page2/page2'';

var cloudSettings: CloudSettings = {
''core'': {
''app_id'': ''xxxxx''
}
};

console.log(cloudSettings);

@NgModule({
declarations: [
MyApp,
HomePage
],
imports: [
IonicModule.forRoot(MyApp),
CloudModule.forRoot(cloudSettings)
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
HomePage
],
providers: [{provide: ErrorHandler , useClass:IonicErrorHandler}]
})
export class AppModule {}

gracias,