Unable to cast object of type 'Avalonia.Media.Color' to type 'Avalonia.Media.IBrush'.

[motcs]

Unable to cast object of type 'Avalonia.Media.Color' to type 'Avalonia.Media.IBrush'.

code:

<Design.DataContext>
<vm:MainWindowViewModel />
</Design.DataContext>




<ItemsControl.ItemsPanel>



</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>


<md:MarkdownScrollViewer Markdown="{Binding }" />



</ItemsControl.ItemTemplate>

ChatRows :
public ObservableCollection ChatRows { get; } = new();

The content was replied by AI, and every time I ask it to generate a Java sorting algorithm, it's just the error message mentioned above. I haven't figured out the specific reason, so please show it to the expert. Thank you very much