ScottPlot 4.1.09-beta

I'm having problem displaying and saving Legend.
Legend doesn't shows on the Plot.
When calling Plot3.Plot.Legend().GetBitmap(false) an exception System.ArgumentException: 'Parameter is not valid.' is thrown.

Code for using and updating Plot in an WPF .net 5 aplication.

public WpfPlot Plot3
{
    get { return _plot3; }
    set { SetProperty(ref _plot3, value); }
}

<ContentControl Grid.Column="2" MinWidth="200" MinHeight="200" Content="{Binding Plot3}"></ContentControl>

var legendBitmap = Plot3.Plot.Legend().GetBitmap(false);