jquery – populate events for FullCalendar 5 with a Json URL in .NET Core

I want to populate events for a FullCalendar 5 with a Json URL in .NET Core

Here’s the initialization of the calendar :

document.addEventListener('DOMContentLoaded', function() {
var calendarEl = document.getElementById('calendar');

var calendar = new FullCalendar.Calendar(calendarEl, {
    
  //themeSystem: 'bootstrap5',

  //plugins: [ timeGridPlugin ],
  initialView: 'timeGridWeek',
  selectable: true,
  selectOverlap: false,
    
  headerToolbar: {
    left: 'prevYear,prev,next,nextYear today',
    center: 'title',
    right: 'dayGridMonth,timeGridWeek,dayGridDay'
  },
  
  buttonText: {
    today:    'Aujourdhui',
    month:    'mois',
    week:     'semaine',
    timeGridWeek: 'jour',
    day:      'jour',
    list:     'liste'
  },
  
  initialDate: '2020-09-12',
  navLinks: true, // can click day/week names to navigate views
  editable: true,
  dayMaxEvents: true, // allow "more" link when too many events
  
  events:'@Url.Action("ListeAnnoncesJSON","Vendeur")'

Here’s the URL “ListeAnnoncesJSON” :

{"sr":1,"title":"exemple","desc":"azazazaza","start":"2022-06-06T12:30:00","end":"2022-06-10T12:30:00"}

There’s no data in the calendar.

If somebody can help me please

Thanks,