ionic serve giving error - ionic-framework

Question

When I am trying to run my app, it is saying
Type IonicApp is part of the declarations of 2 modules: IonicModule and AppModule! Please consider moving IonicApp to a higher module that imports IonicModule and AppModule. You can also create a new NgModule that exports and includes IonicApp then import that NgModule in IonicModule and AppModule.
How do I get rid of this error ?
Copying entire error coming in console below:
ionic-app-script task: "build"
[11:51:25] Error: Type IonicApp in F:/D/IONIC/quicktask/quicktask-web-froala -
test/node_modules/ionic-angular/components/app/app-root.d.ts is part of the declarations of 2 modules:
IonicModule in F:/D/IONIC/quicktask/quicktask-web-froala - test/node_modules/ionic-angular/module.d.ts and
AppModule in F:/D/IONIC/quicktask/quicktask-web-froala - test/src/app/app.module.ts! Please consider moving
IonicApp in F:/D/IONIC/quicktask/quicktask-web-froala -
test/node_modules/ionic-angular/components/app/app-root.d.ts to a higher module that imports IonicModule in
F:/D/IONIC/quicktask/quicktask-web-froala - test/node_modules/ionic-angular/module.d.ts and AppModule in
F:/D/IONIC/quicktask/quicktask-web-froala - test/src/app/app.module.ts. You can also create a new NgModule
that exports and includes IonicApp in F:/D/IONIC/quicktask/quicktask-web-froala -
test/node_modules/ionic-angular/components/app/app-root.d.ts then import that NgModule in IonicModule in
F:/D/IONIC/quicktask/quicktask-web-froala - test/node_modules/ionic-angular/module.d.ts and AppModule in
F:/D/IONIC/quicktask/quicktask-web-froala - test/src/app/app.module.ts.
What should I do?
app.module.ts
import { BrowserModule } from '#angular/platform-browser';
import { ErrorHandler, NgModule } from '#angular/core';
import { App, NavController, IonicErrorHandler, IonicModule,IonicApp } from 'ionic-angular'; // removed IonicApp from here
import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';
import { ListPage } from '../pages/list/list';
import { LoginPage } from '../pages/login/login';
import { NewtaskPage } from '../pages/newtask/newtask';
//import { DashboardPage } from '../pages/dashboard/dashboard';
import { TaskgivenPage } from '../pages/taskgiven/taskgiven';
import { MytaskPage } from '../pages/mytask/mytask';
import { CommunicationPage } from '../pages/communication/communication';
import { CommunicationgivenPage } from '../pages/communicationgiven/communicationgiven';
import { CommunicationreportPage } from '../pages/communicationreport/communicationreport';
import { GivencommunicationclosedPage } from '../pages/givencommunicationclosed/givencommunicationclosed';
import { TestPage } from '../pages/test/test';
import { LogoutPage } from '../pages/logout/logout';
import { MyclosedtaskPage } from '../pages/myclosedtask/myclosedtask';
import { GivenclosedtaskPage } from '../pages/givenclosedtask/givenclosedtask';
import { ReporttoPage } from '../pages/reportto/reportto';
import { SlidePage } from '../pages/slide/slide';
import { StatusBar } from '#ionic-native/status-bar';
import { SplashScreen } from '#ionic-native/splash-screen';
//import { Firebase } from '#ionic-native/firebase';
import { SpeechRecognition } from '#ionic-native/speech-recognition';
import { Headers, Http, HttpModule ,Response } from '#angular/http';
import { IonicStorageModule } from '#ionic/storage';
import { TimeAgoPipe } from 'time-ago-pipe';
import {Commopen} from '../pages/givencommunicationclosed/commopen';
import { Userimage } from '../pages/dashboard2/userimage';
import { MycommclosedPage } from '../pages/mycommclosed/mycommclosed';
import { Dashboard2Page } from '../pages/dashboard2/dashboard2';
import { MytaskuserwisePage } from '../pages/mytaskuserwise/mytaskuserwise';
import { ProfilePage } from '../pages/profile/profile';
import { PaymentPage } from '../pages/payment/payment';
import { InAppBrowser } from '#ionic-native/in-app-browser';
import { InfoPage } from '../pages/info/info';
import { PerformancePage } from '../pages/performance/performance';
import { PopoverPage } from '../pages/communicationgiven/popover';
import { Updatepopup} from '../pages/communicationgiven/updatepopup';
import { TimelinePage } from '../pages/timeline/timeline';
import { Commpopup } from '../pages/timeline/commpopup';
import {SearchPage} from '../pages/search/search';
import {SuggestionPage} from '../pages/suggestion/suggestion';
import {Mytaskpopup} from '../pages/mytask/mytaskpopup';
import {Userwisepopup} from '../pages/mytaskuserwise/userwisepopup';
import {Taskgivenpopup} from '../pages/taskgiven/taskgivenpopup';
import {Reportpopup} from '../pages/reportto/reportpopup';
import {FollowerPage} from '../pages/follower/follower';
import {CommfollowerPage} from '../pages/commfollower/commfollower';
import { CommPage } from '../pages/comm/comm';
import {ReportsPage} from '../pages/reports/reports';
import { DashmodalPage } from '../pages/dashmodal/dashmodal';
import { Dashmodal1Page } from '../pages/dashmodal1/dashmodal1';
import { LabelPage } from '../pages/label/label';
import { SortPage } from '../pages/sort/sort';
import { SortuserwisePage } from '../pages/sortuserwise/sortuserwise';
import { LastseenPage } from '../pages/lastseen/lastseen';
import { MemolistPage } from '../pages/memolist/memolist';
import { OfcmemoPage } from '../pages/ofcmemo/ofcmemo';
import { CommadminPage } from '../pages/commadmin/commadmin';
import { AdminpcPage } from '../pages/adminpc/adminpc';
import {AiPage} from '../pages/ai/ai';
import { Autosize } from '../directives/autosize/autosize';
// Import Froala Editor.
import "froala-editor/js/froala_editor.pkgd.min.js";
import { NoSanitizePipe } from '../pipes/no-sanitize/no-sanitize';
// Import Angular2 plugin.
import { FroalaEditorModule, FroalaViewModule } from 'angular-froala-wysiwyg';
import {Nl2BrPipeModule} from 'nl2br-pipe';
import {LinkyModule} from 'angular-linky';
//Search
import { SelectSearchableModule } from 'ionic-select-searchable';
// for ionic build --prod errors or aot compilation
// import { OverlayPortal } from '../../node_modules/ionic-angular/umd/components/app/overlay-portal.d';
//import { IonicApp } from '../../node_modules/ionic-angular/umd/components/app/app-root.d';
//import { ClickBlock } from '../../node_modules/ionic-angular/umd/components/app/click-block.d';
//import { Slides } from '../../node_modules/ionic-angular/umd/components/slides/slides.d';
import { FilterArrayPipe } from '../pages/dashboard2/filterpipe';
import {IonicPage, NavParams, Slides} from 'ionic-angular';
#NgModule({
declarations: [
// OverlayPortal, //for aot compilation
// IonicApp , //for aot compilation for app-root.d
// ClickBlock, //for aot compilation
// Slides, //for aot compilation
IonicApp,
FilterArrayPipe, //for aot compilation
TimeAgoPipe,
MyApp,
HomePage,
ListPage,
LoginPage,
NewtaskPage,
// DashboardPage,
TaskgivenPage,
MytaskPage,
CommunicationPage,
CommunicationgivenPage,
CommunicationreportPage,
GivencommunicationclosedPage,
TestPage,
LogoutPage,
MyclosedtaskPage,
GivenclosedtaskPage,
ReporttoPage,
Dashboard2Page,
MytaskuserwisePage,
MycommclosedPage,
ProfilePage,
PaymentPage,
InfoPage,
SlidePage,
PerformancePage ,
PopoverPage,
Updatepopup,
SearchPage,
TimelinePage,
Commpopup,
SuggestionPage,
Mytaskpopup,
Userwisepopup,
Taskgivenpopup,
Reportpopup,
AiPage,
Autosize,
NoSanitizePipe,
FollowerPage,
CommfollowerPage,
CommPage,
ReportsPage,
DashmodalPage,
Dashmodal1Page,
LabelPage,
SortPage,
SortuserwisePage,
LastseenPage,
MemolistPage,
OfcmemoPage,
CommadminPage,
AdminpcPage,
//OverlayPortal
],
imports: [
BrowserModule,
HttpModule,
Nl2BrPipeModule,
LinkyModule,
SelectSearchableModule,
IonicModule.forRoot(MyApp),
FroalaEditorModule.forRoot(),
FroalaViewModule.forRoot(),
IonicStorageModule.forRoot()
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
HomePage,
ListPage,
LoginPage,
NewtaskPage,
// DashboardPage,
TaskgivenPage,
MytaskPage,
CommunicationPage,
CommunicationgivenPage,
CommunicationreportPage,
GivencommunicationclosedPage,
TestPage,
LogoutPage,
MyclosedtaskPage,
GivenclosedtaskPage,
ReporttoPage,
Dashboard2Page,
MytaskuserwisePage,
MycommclosedPage,
ProfilePage,
PaymentPage,
InfoPage,
SlidePage,
PerformancePage,
PopoverPage,
Updatepopup,
SearchPage,
TimelinePage,
Commpopup,
SuggestionPage,
Mytaskpopup,
Userwisepopup,
Taskgivenpopup,
Reportpopup,
AiPage,
FollowerPage,
CommfollowerPage,
CommPage,
ReportsPage,
DashmodalPage,
Dashmodal1Page,
LabelPage,
SortPage,
SortuserwisePage,
LastseenPage,
MemolistPage,
OfcmemoPage,
CommadminPage,
AdminpcPage
],
providers: [
StatusBar,
SplashScreen,
//Firebase,
Commopen,
GivenclosedtaskPage,
Userimage,
InAppBrowser,
SpeechRecognition,
{provide: ErrorHandler, useClass: IonicErrorHandler}
]
})
export class AppModule {}

Answer 1

You dont have to add IonicApp in declarations array which is what your error message seems to saying:
Type IonicApp is part of the declarations of 2 modules: IonicModule and AppModule!
declarations: [
// OverlayPortal, //for aot compilation
// IonicApp , //for aot compilation for app-root.d
// ClickBlock, //for aot compilation
// Slides, //for aot compilation
IonicApp,// <-- remove this.
It should only be in bootstrap array.

Answer 2

IonicApp is a component and already declared inside IonicModule and needed only for bootstrapping. It is not a component to be added into declarations.
#NgModule({
declarations: [
// OverlayPortal, //for aot compilation
// IonicApp , //for aot compilation for app-root.d
// ClickBlock, //for aot compilation
// Slides, //for aot compilation
IonicApp ----> delete This line.