Blazor Syncfusion sfgrid export to Excel

I'm trying to Export a list from a filtered Syncfusion grid to Excel. I followed the code from an example. The code runs but nothing seems to happen. I haven't been able to solve this by looking at Syncfusion documentation or googling it. What am I missing?

<SfGrid     ID="ExpenseGrid"    @ref=DefaultGrid    Toolbar="@(new List<string>() {"ExcelExport"})"    AllowExcelExport="true"    DataSource="@expenses"    AllowSorting="true"    AllowFiltering="true"><GridEvents OnToolbarClick="ToolbarClickHandler" TValue="Expense"></GridEvents><GridColumns><GridColumn Field=@nameof(Expense.Item) HeaderText="Item" TextAlign="TextAlign.Center" Width="200"></GridColumn><GridColumn Field=@nameof(Expense.IncurDate) HeaderText="Date" Format="d" Type="ColumnType.Date" TextAlign="TextAlign.Center" Width="130"></GridColumn><GridColumn Field=@nameof(Expense.Cost) HeaderText="Cost" Format="C2" TextAlign="TextAlign.Center" Width="150"></GridColumn><GridColumn Field=@nameof(Expense.Category) HeaderText="Category" TextAlign="TextAlign.Center" Width="120"></GridColumn><GridColumn Field=@nameof(Expense.SubCategory) HeaderText="SubCategory" TextAlign="TextAlign.Center" Width="120"></GridColumn></GridColumns></SfGrid>    @code {        private List<Expense> expenses = new();        private SfGrid<Expense> DefaultGrid;public async Task ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs args){    if(args.Item.Id == "ExpenseGrid_excelexport")    {        await this.DefaultGrid.ExportToExcelAsync();    }}

}