Update app.py

app.py

@@ -218,4 +218,10 @@ with gr.Blocks(title=title, css=css, theme=theme) as demo:
     )
 
 # On Spaces, queue is required to get GPU scheduling; set a modest concurrency
-demo.queue(concurrency_count=1, max_size=8).launch(share=False)
+# OLD (pre-Gradio 4.x)
+# demo.queue(concurrency_count=1, max_size=8).launch(share=False)
+
+# NEW (Gradio 4.x+)
+demo.queue()  # no args here anymore
+demo.launch(share=False, concurrency_count=1, max_threads=1, max_queue_size=4)
+