Expand All failed

[lszoke66]

Hi, when i click expand all, get folowing error:
Error: System.NullReferenceException: Object reference not set to an instance of an object.
at Syncfusion.Blazor.TreeGrid.Internal.ExpandCollapse1.ExpandingHandler(Row1 row, Boolean isFirstTimeRemoteExpand)
at Syncfusion.Blazor.TreeGrid.Internal.ExpandCollapse1.ExpandAllRow() at Syncfusion.Blazor.TreeGrid.SfTreeGrid1.ExpandAllAsync()
at Syncfusion.Blazor.Gantt.SfGantt1.ExpandAllAsync() at Syncfusion.Blazor.Gantt.Internal.Toolbar1.ToolbarClickHandler(ClickEventArgs args)
at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
at Syncfusion.Blazor.Internal.SfBaseUtils.InvokeEvent[T](Object eventFn, T eventArgs)
at Syncfusion.Blazor.Navigations.SfToolbar.TriggerClickEvent(MouseEventArgs e, Nullable`1 trgParentDataIndex, ItemModel clickedItem)
at Syncfusion.Blazor.Navigations.Internal.ToolbarContent.OnItemClick(MouseEventArgs e)
at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)