wabbajack/Wabbajack.App/Screens/ErrorPageView.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             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:controls="clr-namespace:Wabbajack.App.Controls"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="Wabbajack.App.Screens.ErrorPageView">
    <Grid RowDefinitions="Auto, Auto, *">
        <TextBlock Grid.Row="0" x:Name="Prefix" />
        <TextBlock Grid.Row="1" x:Name="Message" />
        <controls:LogView Grid.Row="3" />
    </Grid>
</UserControl>