[fix?:] will this work?

MainWindow.axaml.cs

@@ -785,14 +785,14 @@ public partial class MainWindow : Window
         // hier nach winpafd prüfen
         var filePath = await saveDialog.ShowAsync(this);
 
-        if (!string.IsNullOrEmpty(filePath))
+        if (!string.IsNullOrWhiteSpace(filePath))
         {
-            if (Uri.TryCreate(filePath, UriKind.Absolute, out var uri)
+            if (filePath.StartsWith("file://"))
-                && uri.IsFile)
             {
-                filePath = uri.LocalPath;
+                filePath = new Uri(filePath).LocalPath;
             }
-
+            Console.WriteLine(filePath);
+            
             var builder = new PdfBuilder(Settings._instance.pdfExport);
 
             builder.CreateAddressLabelPdfFromAddressSetWithPlaceholder(