Frontend Angular 4/src/app/layout/grupos/grupos.module.ts

-import { NgModule } from '@angular/core';
-import { FormsModule } from '@angular/forms';
-import { GruposComponent } from './grupos.component';
-import { CommonModule } from '@angular/common';
-import { GruposRoutingModule } from './grupos-routing.module';
-import { DialogService } from "ng2-bootstrap-modal";
-import { NotificacionService } from '../../shared/services/notificacion.service';
-import { BootstrapModalModule } from 'ng2-bootstrap-modal';
-import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
-import { CodemirrorModule } from 'ng2-codemirror';
-import { CalificarEntrega } from './calificarEntrega.component';
-import { NotificacionModule } from '../../notificacion/notificacion.module'; 
+import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from "@angular/core";
+import { FormsModule } from "@angular/forms";
+import { GruposComponent } from "./grupos.component";
+import { CommonModule } from "@angular/common";
+import { GruposRoutingModule } from "./grupos-routing.module";
+import { NgbModule } from "@ng-bootstrap/ng-bootstrap";
+import { LtCodemirrorModule } from "lt-codemirror";
+import { NotificacionModule } from "../../notificacion/notificacion.module";
+import { I18nModule } from "../../shared/modules/translate/i18n.module";
+import { TitleCaseModule } from "../../shared/modules/titlecase.module";
 
 @NgModule({
-    imports: [CommonModule, GruposRoutingModule, FormsModule,BootstrapModalModule, NgbModule, CodemirrorModule,NotificacionModule],
-    declarations: [GruposComponent, CalificarEntrega],
+  imports: [
+    CommonModule,
+    GruposRoutingModule,
+    FormsModule,
+    NgbModule,
+    LtCodemirrorModule,
+    NotificacionModule,
+    I18nModule,
+    TitleCaseModule,
+  ],
+  declarations: [GruposComponent],
   exports: [GruposComponent],
-    entryComponents: [CalificarEntrega]
+  schemas: [CUSTOM_ELEMENTS_SCHEMA],
 })
-
 export class GruposModule {}