diff --git a/ChatController/HauptKlassen/Chat.cs b/ChatController/HauptKlassen/Chat.cs
index 6a62a5f..aee1921 100644
--- a/ChatController/HauptKlassen/Chat.cs
+++ b/ChatController/HauptKlassen/Chat.cs
@@ -116,7 +116,7 @@ namespace ChatController.HauptKlassen
             {
                 LoadMessagesFromServerAsync(contact.GroupId, delegate
                 {
-                    callback?.Invoke(AddMessagesFromServerResponse(_UserMessages.Response.Messages, previousMessage));
+                    callback?.Invoke(AddMessagesFromServerResponse(_UserMessages?.Response.Messages ?? new Messages[0], previousMessage));
                 });
 
                 return;