Hello Everyone,
I tried to use DataGrid with OData service but Add button doesn't work for me and I don't see any error, just nothing happens.

@page "/countries"
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components.WebAssembly.Authentication
@using Company.Domain.Data
@using Company.Domain.Dictionaries
@attribute [Authorize]
@inject HttpClient Http
<h1>Countries</h1>
<p>Countries.</p>
@using Syncfusion.Blazor
@using Syncfusion.Blazor.Grids
@using Syncfusion.Blazor.DropDowns
@using Syncfusion.Blazor.Data
<SfGrid TValue="Country" EnableHover="true" AllowPaging="true" Toolbar="@(new List<string>() { " Add", "Edit" , "Delete" , "Cancel" , "Update" })">
<GridEditSettings AllowAdding="true" AllowEditing="true" AllowDeleting="true" Mode="EditMode.Normal"></GridEditSettings>
<SfDataManager Url="/odata/countries" Adaptor="Adaptors.ODataV4Adaptor"></SfDataManager>
<GridColumns>
<GridColumn Field=@nameof(Country.RecId) HeaderText="Id" IsPrimaryKey="true" IsIdentity="true" Visible="false"></GridColumn>
<GridColumn Field=@nameof(Country.Name) HeaderText="Name"></GridColumn>
<GridColumn Field=@nameof(Country.EnglishName) HeaderText="English Name"></GridColumn>
<GridColumn Field=@nameof(Country.Code) HeaderText="Code"></GridColumn>
</GridColumns>
</SfGrid>
Any idea what might have gone wrong here?