Hi,
I have an error on my application when I run ionic cordova build android --prod --release --verbose 
[14:08:11] build prod started ...
[14:08:11] clean started ...
[14:08:11] clean finished in 1 ms
[14:08:11] copy started ...
[14:08:11] deeplinks started ...
[14:08:11] deeplinks finished in 54 ms
[14:08:11] ngc started ...
[14:08:14] typescript error
Encountered undefined provider! Usually this means you have a circular dependencies (might be caused by
using 'barrel' index.ts files. debug = provider for the NgModule 'AppModule in
C:/Users/clami/Documents/IONIC/APPLIS/Docks/docksfidelite/src/app/app.module.ts'
Error: The Angular AoT build failed. See the issues above
at C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:237:55
at step (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:32:23)
at Object.next (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:13:53)
at fulfilled (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:4:58)
[DEBUG] Error: The Angular AoT build failed. See the issues above
at C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:237:55
at step (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:32:23)
at Object.next (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:13:53)
at fulfilled (C:\Users\clami\Documents\IONIC\APPLIS\Docks\docksfidelite\node_modules\@ionic\app-scripts\dist\aot\aot-compiler.js:4:58)
And my app.module.ts :
import { NgModule, ErrorHandler } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';
import { HttpModule } from '@angular/http';
import { BoutiquesPage } from '../pages/boutiques/boutiques';
import { HomePage } from '../pages/home/home';
import { OffresPage } from '../pages/offres/offres';
import { BoutiquedetailPage } from '../pages/boutiquedetail/boutiquedetail'
import { QrcodePage } from '../pages/qrcode/qrcode';
import { LoginPage } from '../pages/login/login';
import { HomeconnexionPage } from '../pages/homeconnexion/homeconnexion';
import { InscriptionPage } from '../pages/inscription/inscription';
import { ForgotPage } from '../pages/forgot/forgot';
import { UserPage } from '../pages/user/user';
import { UserinfosPage } from '../pages/userinfos/userinfos';
import { UserpasswordPage } from '../pages/userpassword/userpassword';
import { MentionsPage } from '../pages/mentions/mentions';
import { StatusBar } from '@ionic-native/status-bar';
import { BarcodeScanner } from '@ionic-native/barcode-scanner';
import { SplashScreen } from '@ionic-native/splash-screen';
import { DataserviceProvider } from '../providers/dataservice/dataservice';
import { EmailComposer } from '@ionic-native/email-composer';
import { IonicStorageModule } from '@ionic/storage';
import { CallNumber } from '@ionic-native/call-number';
import { InAppBrowser } from '@ionic-native/in-app-browser';
import { BoutiqueCardComponent } from '../components/boutique-card/boutique-card';
@NgModule({
declarations: [
MyApp,
BoutiquesPage,
HomePage,
OffresPage,
BoutiquedetailPage,
QrcodePage,
LoginPage,
HomeconnexionPage,
InscriptionPage,
ForgotPage,
UserPage,
UserinfosPage,
UserpasswordPage,
MentionsPage,
BoutiqueCardComponent
],
imports: [
BrowserModule,
IonicModule.forRoot(MyApp),
IonicStorageModule.forRoot(),
HttpModule
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
BoutiquesPage,
HomePage,
OffresPage,
BoutiquedetailPage,
QrcodePage,
LoginPage,
HomeconnexionPage,
InscriptionPage,
ForgotPage,
UserPage,
UserinfosPage,
UserpasswordPage,
MentionsPage,
BoutiqueCardComponent
],
providers: [
StatusBar,
SplashScreen,
BarcodeScanner,
{provide: ErrorHandler, useClass: IonicErrorHandler},
DataserviceProvider,
EmailComposer,
CallNumber,
InAppBrowser,
Storage
]
})
export class AppModule {}
And here is the only provider I developed for the application: DataserviceProvider
import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import 'rxjs/add/operator/map';
/*
Generated class for the DataserviceProvider provider.
See https://angular.io/guide/dependency-injection for more info on providers
and Angular DI.
*/
@Injectable()
export class DataserviceProvider {
private baseUrl = "https://www.lesdocks-marseille.com/";
constructor(private http: Http) {
}
retrieveData(){
return this.http.get(this.baseUrl+"API/boutiques")
}
retrieveDataRestaurants(){
return this.http.get(this.baseUrl+"API/restaurants")
}
retrieveDataPartenaires(){
return this.http.get(this.baseUrl+"API/partenaires")
}
retrieveDataById(id_){
return this.http.get(this.baseUrl+"API/boutiques/"+id_)
}
retrieveDataPartenaireById(id_){
return this.http.get(this.baseUrl+"API/partenaires/"+id_)
}
retrieveDataPromosById(id_)
{
return this.http.get(this.baseUrl+"API/promotions/"+id_)
}
retrieveBoutiquesPromos(){
return this.http.get(this.baseUrl+"API/offres/1")
}
retrieveRestosPromos(){
return this.http.get(this.baseUrl+"API/offres/2")
}
retrievePartenairesPromos(){
return this.http.get(this.baseUrl+"API/offres/3")
}
}
When I execute ionic cordova run android, everything goes well, it is only at the time of the build that I have this error
I searched many forums for solutions to this problem but none worked.
Could you help me?
Thank you !