fix clear button

app.py

@@ -205,8 +205,11 @@ with demo:
         lesson_graph.graph_to_json,
         outputs=[message_output]
     )
-    
-    clear_btn.click(lesson_graph.clear_graph, outputs=search_output, graph_output, message_output)
+
+    clear_btn.click(
+        lesson_graph.clear_graph,
+        outputs=[search_output, graph_output, message_output]  # Pass all the outputs as a list
+    )
 
     # Add Markdown section explaining the purpose and use of the app
     gr.Markdown("""