{System.NullReferenceException: Object reference not set to an instance of an object.
   at Syncfusion.SfChart.XForms.UWP.ChartAxisMapping.OnAxisPropertiesChanged(String propertyName, ChartAxis formAxis, ChartAxisBase2D nativeAxis)
   at Syncfusion.SfChart.XForms.UWP.ChartAxisMapping.OnRangeAxisBasePropertiesChanged(String propertyName, RangeAxisBase formRangeAxisBase, RangeAxisBase nativeRangeAxisBase)
   at Syncfusion.SfChart.XForms.UWP.ChartAxisMapping.OnDateTimeAxisPropertiesChanged(String propertyName, DateTimeAxis formDateTimeAxis, DateTimeAxis nativeDateTimeAxis)
   at Syncfusion.SfChart.XForms.UWP.ChartAxisMapping.GetAxis(ChartAxis chartAxis)
   at Syncfusion.SfChart.XForms.UWP.SfChartMapping.OnChartPropertiesChanged(String propertyName, SfChart formsChart, SfChart nativeChart)
   at Syncfusion.SfChart.XForms.UWP.SfChartRenderer.GetNativeChart(SfChart sfChart)
   at Syncfusion.SfChart.XForms.UWP.SfChartRenderer.OnElementChanged(ElementChangedEventArgs`1 e)
   at Xamarin.Forms.Platform.UWP.VisualElementRenderer`2.SetElement(VisualElement element)
   at Xamarin.Forms.Platform.UWP.Platform.CreateRenderer(VisualElement element)
   at Xamarin.Forms.Platform.UWP.VisualElementPackager.SetupVisualElement(VisualElement view)
   at Xamarin.Forms.Platform.UWP.VisualElementPackager.Load()
   at Xamarin.Forms.Platform.UWP.VisualElementRenderer`2.SetElement(VisualElement element)
   at Xamarin.Forms.Platform.UWP.Platform.CreateRenderer(VisualElement element)
   at Xamarin.Forms.Platform.UWP.VisualElementPackager.SetupVisualElement(VisualElement view)
   at Xamarin.Forms.Platform.UWP.VisualElementPackager.Load()
   at Xamarin.Forms.Platform.UWP.VisualElementRenderer`2.SetElement(VisualElement element)
   at Xamarin.Forms.Platform.UWP.Platform.CreateRenderer(VisualElement element)
   at Xamarin.Forms.Platform.UWP.VisualElementExtensions.GetOrCreateRenderer(VisualElement self)
   at Xamarin.Forms.Platform.UWP.Platform.<SetCurrent>d__43.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   at System.Threading.WinRTSynchronizationContextBase.Invoker.InvokeCore()}