FullCalendar doesn't show on Angular 16

Question

I installed FullCalendar in my Ionic 6 Angular 16 app, based on https://fullcalendar.io/docs/angular, step by step, and doesn't show anything on browser (chrome).

In Inspector tool shows the FullCalendar tag, but is empty.

¿I'm missing something? I used it in another app before and works perfectly.

app.module.ts:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';
import { IonicModule, IonicRouteStrategy } from '@ionic/angular';

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';

import { HttpClientModule, HttpHeaders } from '@angular/common/http';

import { ComponentsModule } from './components/components.module';

import { FullCalendarModule } from '@fullcalendar/angular';

@NgModule({
  declarations: [AppComponent ],
  imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule, HttpClientModule, ComponentsModule, FullCalendarModule],
  providers: [{ provide: RouteReuseStrategy, useClass: IonicRouteStrategy }],
  bootstrap: [AppComponent],
})

export class AppModule {}

calendar.page.ts:

import { Component, OnInit } from '@angular/core';

import { HttpClient } from '@angular/common/http';

import { CalendarOptions } from '@fullcalendar/core'; // useful for typechecking
import dayGridPlugin from '@fullcalendar/daygrid';

@Component({
  selector: 'app-calendar',
  templateUrl: './calendar.page.html',
  styleUrls: ['./calendar.page.scss'],
})

export class CalendarPage implements OnInit {

  post:any;
  i:number=0;

  calendarOptions: CalendarOptions = {
    initialView: 'dayGridMonth',
    plugins: [dayGridPlugin]
  };

  constructor(private http: HttpClient) { }

  ngOnInit() {
   
  }

}

calendar.page.html:

<ion-header [translucent]="true">
  <ion-toolbar>
    <ion-title>calendar</ion-title>
  </ion-toolbar>
</ion-header>

<ion-content [fullscreen]="true">
  <ion-breadcrumbs>
    <ion-breadcrumb>Panel</ion-breadcrumb>
    <ion-breadcrumb>Calendario</ion-breadcrumb>
  </ion-breadcrumbs>
 
  <full-calendar [options]="calendarOptions"></full-calendar>
  
</ion-content>

Answer 1

Apparently, in v16 of Angular, the FullCalendarModule goes in the component.module.ts, contrary to what says in API (app.module.ts).