Error messages are now caught at the app level (see if it's a good solution in the long term)

Redesign of the create key file button

ModernKeePass/Common/MessageDialogHelper.cs

@@ -26,6 +26,7 @@ namespace ModernKeePass.Common
 
         public static async void ShowErrorDialog(Exception exception)
         {
+            if (exception == null) return;
             // Create the message dialog and set its content
             var messageDialog = new MessageDialog(exception.Message, "Error occured");