buttons requires fun

app.py

@@ -252,7 +252,7 @@ with gr.Blocks(title = 'Make-A-Video Stable Diffusion JAX', analytics_enabled =
         inputs = trigger_inputs,
         outputs = will_trigger
     )
-    cancel_button.click(cancels = ev)
+    cancel_button.click(fn = lambda: None, cancels = ev)
 
 demo.queue(concurrency_count = 1, max_size = 16)
 demo.launch()