Update app.py

app.queue()
app.launch(share=False, debug=True, show_error=True)

app.py

@@ -51,4 +51,5 @@ with gr.Blocks(title="FBA Matting") as app:
     with gr.Row():
         gr.HTML(footer)
 
-app.launch(share=False, debug=True, enable_queue=True, show_error=True)
+app.queue()
+app.launch(share=False, debug=True, show_error=True)