ajax request from JavaScript to asp.net MVC core 6 controller not working

I am using asp.net core 6 to send JavaScript request to controller for adding data but its not responding and after data: command it jumps to error section

$.ajax({
    url: routeURL + '/api/Appointment/SaveCalendarData',
    type: 'Post',
    headers: {
        'Accept': 'application/json',
        'Content-Type': 'application/json'
    },
    data: JSON.stringify(requestData),
    success: function (response) {
        if (response.status == 1) {
            console.log(response);
            //$notify(response.message, "success");
            onCloseModal();
        }
        else {
            console.log("Error");
            //$notify(response.message, "error");
        }
    },
    error: function () {
        console.log("Error error log");
    }
});

here is the request data from where data is coming from razor in request Data Function

function onSubmitForm() {
var requestData = {
    Id: parseInt($("#id").val()),
    Title: $("#title").val(),
    Description: $("#description").val(),
    StartDate: $("#appointmentDate").val(),
    Duration: $("#duration").val(),
    DoctorId: $("#doctorid").val(),
    PatientId: $("#patientId").val()
}
console.log(requestData);

and here is the controller side but JavaScript request doesn’t hit controller side

    namespace AppointmentSchedule.Controllers.Api
{
    [Route("api/Appointment")]
    [ApiController]
    public class AppointmentApiController : Controller
    {
        private readonly IAppointmentService _appointmentService;
        private readonly IHttpContextAccessor _httpContextAccessor;
        private readonly string loginUserId;
        private readonly string role;
        public AppointmentApiController(IAppointmentService appointmentService, IHttpContextAccessor httpContextAccessor, string loginUserId)
        {
            _appointmentService = appointmentService;
            _httpContextAccessor = httpContextAccessor;
            loginUserId = _httpContextAccessor.HttpContext.User.FindFirstValue(ClaimTypes.NameIdentifier);
            role = _httpContextAccessor.HttpContext.User.FindFirstValue(ClaimTypes.Role);
        }
        [HttpPost]
        [Route("SaveCalendarData")]
        public JsonResult SaveCalendarData(AppointmentVM data)
        {
            CommonResponse<int> commonResponse = new CommonResponse<int>();
            try
            {
                commonResponse.status = _appointmentService.AddUpdate(data).Result;
                if (commonResponse.status == 1) 
                {
                    commonResponse.message = Helper.Helper.appointmentUpdated;
                }
                if (commonResponse.status == 2)
                {
                    commonResponse.message = Helper.Helper.appointmentAdded;
                }
            }
            catch (Exception e)
            {
                commonResponse.message = e.Message;
                commonResponse.status = Helper.Helper.failure_code;
            }
            return Json(commonResponse);
        }
    }
}

and last its Program.cs file

    var builder = WebApplication.CreateBuilder(args);

builder.Services.AddDbContext<ApplicationDbContext>(options=>options.UseSqlServer(builder.Configuration.GetConnectionString("DefaultConnection")));
// Add services to the container.
builder.Services.AddTransient<IAppointmentService, AppointmentService>();
builder.Services.AddControllersWithViews();
builder.Services.AddIdentity<ApplicationUser, IdentityRole>().AddEntityFrameworkStores<ApplicationDbContext>();
builder.Services.AddHttpContextAccessor();
var app = builder.Build();

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseDefaultFiles();
app.UseStaticFiles();


app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();