Update app.py

app.py

@@ -437,7 +437,8 @@ with gr.Blocks(theme=theme, css=css) as demo:
             #            run_button = gr.Button(label="Run")
             with gr.Column():
                 gallery = gr.Gallery(label="Generated images", show_label=False, height="auto")
-        preprocessor_name.insert = lambda: run_button.set_value(preprocessor_name.value)
+
+        preprocessor_name.input(lambda: run_button.set_value(preprocessor_name.value))
         run_button.click(fn=lineart, inputs=[input_image, resolution, preprocessor_name, invert], outputs=[gallery])
 
     with gr.Tab("InPaint"):