Update app.py

app.py

@@ -69,15 +69,16 @@ def respond(
     connected, paywall_msg = check_paywall(user_id)
     
     if not connected:
-        # When user is not connected, return empty history and paywall message string
-        return [], paywall_msg
+        # Append paywall message as assistant role message
+        new_history = history + [{"role": "assistant", "content": paywall_msg}]
+        # Return updated chat history twice to satisfy Gradio's expected tuple of lists
+        return new_history, new_history
     
-    # If connected, get chatbot reply
+    # User connected - get chatbot reply
     reply_text = chat_completion(user_id, system_message, history, message, max_tokens, temperature, top_p)
-    
-    # Append new exchange to history
     new_history = history + [{"role": "user", "content": message}, {"role": "assistant", "content": reply_text}]
-    return new_history, ""  # second return clears the input box
+    return new_history, new_history  # Return two lists of messages as required
+
 
 # Gradio UI setup with additional inputs
 chatbot = gr.ChatInterface(