Update app.py

app.py

@@ -216,9 +216,10 @@ def Chat_Message(history, messages1):
     except Exception as e:
         error_message = str(e)
         start_index = error_message.find("Input validation error:")
-        end_index = error_message.find("and 4096 `max_new_tokens`")
+        end_index = error_message.find("\n")
         if start_index != -1 and end_index != -1:
-            messages1 = messages1[:-2]
+            messages1.pop()
+            messages1.pop()
             raise gr.Error(error_message[start_index:end_index].strip()) from e
         else:
             raise gr.Error("Error occurred during response") from e