Uri Format Exception In UserControl without any CachedImage Control inside.

[ZuiMelanieForno]

Hello.

I have in Visual Studio 2019 the issue of an UriFormatException.

I created a new UserControl as a View. Moved to a Namespace "Views".

But I don´t have Anything placed in the UserControl yet.

No ImageCache References or a ImageCache-Control.

<UserControl x:Class="Views.SettingsView"
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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:viewModels="clr-namespace:SerienNaGer_Desktop.ViewModels"
d:DesignHeight="450"
d:DesignWidth="800"
mc:Ignorable="d">
<Grid />
</UserControl>

So I get Squiggly Lines under "<UserControl ", and following Exception.

UriFormatException: Ungültiger URI: Das URI-Format konnte nicht bestimmt werden.
UriFormatException: Invalid URI: The URI-Format could not be determined. <-Manual translation

StackTrace:
bei System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   bei System.Uri..ctor(String uriString)
   bei CachedImage.Image.<ImageUrlPropertyChanged>d__0.MoveNext()
--- Ende der Stapelüberwachung vom vorhergehenden Ort, an dem die Ausnahme ausgelöst wurde ---
   bei System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   bei System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   bei System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

I had a Workaround for the other ImageCache-Controls, where I can´t use the XAML-Designer except I Remove the ImageUrl-Property from the Control temporarily.

This is somehow strange to me.
How does the ImageCache can "Bleed" into a UserControl?

thx in advance Zui