Radzen Dropdown didn't show any data

I'm using radzen component to show dropdown, but no data showed up.

<RadzenFormField Text="Class"><ChildContent><RadzenDropDown Data="@MasterClasses"                         TextProperty="Name"                         ValueProperty="Id"                         @bind-Value="@selectedClass"                         Placeholder="Please select a class"/></ChildContent><Helper><RadzenRequiredValidator Component="selectedClass" Text="Class is required" /></Helper></RadzenFormField>@code{private IEnumerable<MasterClass> MasterClasses;private int selectedClass;protected override async Task OnInitializedAsync(){    MasterClasses = await DbContext.MasterClasses.Select(mc => new MasterClass        {            Id = mc.Id,            ClassroomName = mc.ClassroomName        }).ToListAsync();    await base.OnInitializedAsync();}}

I already ensure that all the property has the correct configuration but i dont know why no data is showed up even though there is data in my database. Any idea what might be missing here?

i'm using .NET8 and server side rendermode