diff --git a/app/MindWork AI Studio/Assistants/AssistantBase.razor.cs b/app/MindWork AI Studio/Assistants/AssistantBase.razor.cs
index 663c73c9..b4764a28 100644
--- a/app/MindWork AI Studio/Assistants/AssistantBase.razor.cs	
+++ b/app/MindWork AI Studio/Assistants/AssistantBase.razor.cs	
@@ -245,7 +245,7 @@ public abstract partial class AssistantBase : ComponentBase, IMessageBusReceiver
     
     protected Task SendToAssistant(Tools.Components destination, SendToButton sendToButton)
     {
-        var contentToSend = sendToButton.UseResultingContentBlockData switch
+        var contentToSend = sendToButton == default ? string.Empty : sendToButton.UseResultingContentBlockData switch
         {
             false => sendToButton.GetText(),
             true => this.resultingContentBlock?.Content switch