Application: ThemeEditor.exe
CoreCLR Version: 4.700.19.32702
.NET Core Version: 3.0.0-preview7-27912-14
Description: The process was terminated due to an unhandled exception.
Exception Info: Portable.Xaml.XamlObjectWriterException: Set value of member '{clr-namespace:Avalonia.Styling;assembly=Avalonia.Styling}Setter.Value' threw an exception
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Portable.Xaml.ComponentModel.TypeDescriptorExtensions.GetService[T](ITypeDescriptorContext ctx)
   at Portable.Xaml.ComponentModel.TypeDescriptorExtensions.GetWriterSettings(ITypeDescriptorContext ctx)
   at Portable.Xaml.ComponentModel.TypeDescriptorExtensions.GetBaseUri(ITypeDescriptorContext ctx)
   at Avalonia.Markup.Xaml.Converters.FontFamilyTypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
   at System.ComponentModel.TypeConverter.ConvertFromString(ITypeDescriptorContext context, CultureInfo culture, String text)
   at Avalonia.Markup.Xaml.Converters.SetterValueTypeConverter.ConvertSetterValue(ITypeDescriptorContext dcontext, XamlSchemaContext context, CultureInfo info, Setter setter, Object value)
   at Avalonia.Markup.Xaml.PortableXaml.PropertyXamlMember.PropertyInvoker.SetValue(Object instance, Object value)
   at Portable.Xaml.XamlObjectWriterInternal.SetValue(XamlMember member, Object target, Object value)
   --- End of inner exception stack trace ---
   at Portable.Xaml.XamlObjectWriterInternal.SetValue(XamlMember member, Object target, Object value)
   at Portable.Xaml.XamlObjectWriterInternal.SetValue(XamlMember member, Object value)
   at Portable.Xaml.XamlObjectWriterInternal.OnWriteEndMember()
   at Portable.Xaml.XamlWriterInternalBase.WriteEndMember()
   at Portable.Xaml.XamlObjectWriter.WriteEndMember()
   at Portable.Xaml.XamlWriter.WriteNode(XamlReader reader)
   at Portable.Xaml.XamlServices.Transform(XamlReader xamlReader, XamlWriter xamlWriter, Boolean closeWriter)
   at Portable.Xaml.XamlServices.Transform(XamlReader xamlReader, XamlWriter xamlWriter)
   at Avalonia.Markup.Xaml.AvaloniaXamlLoader.LoadFromReader(XamlReader reader, AvaloniaXamlContext context, IAmbientProvider parentAmbientProvider)
   at Avalonia.Markup.Xaml.AvaloniaXamlLoader.Load(Stream stream, Assembly localAssembly, Object rootInstance, Uri uri)
   at Avalonia.Markup.Xaml.AvaloniaXamlLoader.Load(Type type, Object rootInstance)
   at Avalonia.Markup.Xaml.AvaloniaXamlLoader.Load(Object obj)
   at ThemeEditor.App.Initialize() in D:\a\1\s\src\ThemeEditor\App.xaml.cs:line 11
   at Avalonia.Controls.AppBuilderBase`1.Setup()
   at Avalonia.Controls.AppBuilderBase`1.Start(AppMainDelegate main, String[] args)
   at ThemeEditor.Program.Main(String[] args) in D:\a\1\s\src\ThemeEditor\Program.cs:line 18