Slapped bandaids on things for a fast release test.

PcgsInvUi/Views/ErrorWindow.axaml.cs

@@ -1,11 +1,11 @@
-using Avalonia;
-using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
+using Avalonia.ReactiveUI;
+using PcgsInvUi.ViewModels;
 
 namespace PcgsInvUi.Views; 
 
-public partial class ErrorWindow : Window {
-    public ErrorWindow() {
+public partial class ErrorWindow : ReactiveWindow<ErrorWindowViewModel> {
+    public ErrorWindow()
+    {
         InitializeComponent();
     }
 }