ResizeMode="NoResize" and ShowInTaskbar="False" causes crash on startup

[VratislavBelsky]

Try to yourself adjust RibbonWindow thus:
<fluent:RibbonWindow x:Class="FluentTest.RibbonWindowWithoutRibbon"
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:fluent="urn:fluent-ribbon"
mc:Ignorable="d"
Title="RibbonWindowWithoutRibbon"
ResizeMode="NoResize"
ShowInTaskbar="False"
Height="300"
Width="300">

There is no Ribbon in this Window.

</fluent:RibbonWindow>
does not work from version ControlyEx-alpha0245

• Fluent.Ribbon v7
• Windows 10
• .NET Framework 4.62