Update app2.py

app2.py

@@ -1420,7 +1420,7 @@ def respond_to_chat(
              ])
 
     # --- End of main try block ---
-    except Exception as e:
+    except Exception, e:
         logger.error(f"Chatbot runtime error: {e}")
         response = f"An internal error occurred while processing your request: {e}"
         response += "\nPlease try rephrasing your question or clear the chat history."