Dynamic series of different types with their own Yaxis

I need to make a chart where some series are lineseries and others are scatterseries. They should each have their own Y-axis which can be configured with Ymin and Ymax. I would also like to set the same color on the series and the corresponding Y-axis font.

I followed this example:

How to generate dynamic number of series based on common items source in WPF Chart (SfChart)? | Syncfusion KB

But I have some binding problems: SerieName(string), Ymax(double), Ymin(double) and SerieColor(SolidColorBrush). What am I doing wrong?

My ViewModel has the property: ObservableCollection<ChartSerie> Series

The ChartSerie class:

namespace SyncFusionTest

{

    using System.Collections.ObjectModel;

    using System.ComponentModel;

    using System.Runtime.CompilerServices;

    using System.Windows.Media;

    public class ChartSerie : INotifyPropertyChanged

    {

        public ChartSerie()

        {

            this.Points = new ObservableCollection<ChartPoint>();

        }

        public event PropertyChangedEventHandler PropertyChanged;

        public bool IsRef { get; set; }

        public ObservableCollection<ChartPoint> Points { get; }

        public SolidColorBrush SerieColor { get; set; }

        public string SerieName { get; set; }

        public double Ymax { get; set; }

        public double Ymin { get; set; }

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)

        {

            this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        }

    }

}

The ChartPoint class:

namespace SyncFusionTest

{

    using System;

    public class ChartPoint

    {

        public DateTime TimeStamp { get; set; }

        public double Value { get; set; }

    }

}

My View:

<Window

    x:Class="SyncFusionTest.MainWindow"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:local="clr-namespace:SyncFusionTest"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    xmlns:syncfusion="http://schemas.syncfusion.com/wpf"

    Title="MainWindow"

    Width="800"

    Height="450"

    DataContext="{DynamicResource ViewModel}"

    mc:Ignorable="d">

    <Window.Resources>

        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />

        <DataTemplate x:Key="ScatterSeriesTemplate" DataType="local:ChartSerie">

            <syncfusion:ScatterSeries

                ItemsSource="{Binding Path=Points}"

                Label="{Binding Path=SerieName}"

                Palette="Custom"

                ScatterHeight="5"

                ScatterWidth="5"

                XBindingPath="TimeStamp"

                YBindingPath="Value">

                <syncfusion:ScatterSeries.YAxis>

                    <syncfusion:NumericalAxis

                        Foreground="{Binding Path=SerieColor}"

                        Header="{Binding Path=SerieName}"

                        Maximum="{Binding Path=Ymax}"

                        Minimum="{Binding Path=Ymin}" />

                </syncfusion:ScatterSeries.YAxis>

                <syncfusion:ScatterSeries.ColorModel>

                    <syncfusion:ChartColorModel>

                        <syncfusion:ChartColorModel.CustomBrushes>

                            <SolidColorBrush Color="{Binding Path=SerieColor}" />

                        </syncfusion:ChartColorModel.CustomBrushes>

                    </syncfusion:ChartColorModel>

                </syncfusion:ScatterSeries.ColorModel>

            </syncfusion:ScatterSeries>

        </DataTemplate>

        <DataTemplate x:Key="LineSeriesTemplate" DataType="local:ChartSerie">

            <syncfusion:LineSeries

                ItemsSource="{Binding Path=Points}"

                Label="{Binding Path=SerieName}"

                Palette="Custom"

                XBindingPath="TimeStamp"

                YBindingPath="Value">

                <syncfusion:LineSeries.YAxis>

                    <syncfusion:NumericalAxis

                        Foreground="{Binding Path=SerieColor}"

                        Header="{Binding Path=SerieName}"

                        Maximum="{Binding Path=Ymax}"

                        Minimum="{Binding Path=Ymin}" />

                </syncfusion:LineSeries.YAxis>

                <syncfusion:LineSeries.ColorModel>

                    <syncfusion:ChartColorModel>

                        <syncfusion:ChartColorModel.CustomBrushes>

                            <SolidColorBrush Color="{Binding Path=SerieColor}" />

                        </syncfusion:ChartColorModel.CustomBrushes>

                    </syncfusion:ChartColorModel>

                </syncfusion:LineSeries.ColorModel>

            </syncfusion:LineSeries>

        </DataTemplate>

    </Window.Resources>

    <Grid>

        <local:SfChartExt Source="{Binding Path=Series}">

            <local:SfChartExt.PrimaryAxis>

                <syncfusion:DateTimeAxis />

            </local:SfChartExt.PrimaryAxis>

            <local:SfChartExt.SeriesTemplateSelector>

                <local:SeriesDataTemplateSelector LineSeriesTemplate="{StaticResource LineSeriesTemplate}" ScatterSeriesTemplate="{StaticResource ScatterSeriesTemplate}" />

            </local:SfChartExt.SeriesTemplateSelector>

        </local:SfChartExt>

    </Grid>

</Window>