Update app.py

app.py

@@ -128,7 +128,7 @@ def main():
                               dataset_uploaded_load)
         dataset_choice.change(textbox_button_visibility,
                               dataset_choice,
-                              dataset_predefined)
+                              dataset_predefined_load)
         
         # Dataset button
         dataset_predefined_load.click(fn=get_predefined_dataset,