Update app.py

app.py

@@ -73,6 +73,6 @@ demo = gr.Interface(fn=vqa_main,
                          examples=examples, 
                          title=title,
                          description=description,
-                         article=article)
-demo.queue(concurrency_count=2)
+                         article=article, 
+                         enable_queue = True)
 demo.launch(debug=True, show_error = True)