replace build_endpoint to isolate cause

app.py

@@ -161,15 +161,11 @@ with gr.Blocks() as demo:
         ),
     ]
 
-    build_endpoint(
-        model_card=model_card,
-        input_components=input_components,
-        output_components=output_components,
-        process_fn=process_fn,
-    )
+    submit_btn = gr.Button("Generate")
+    submit_btn.click(fn=process_fn, inputs=input_components, outputs=output_components)
 
 
-demo.launch(
+demo.queue().launch(
     server_name="0.0.0.0",
     server_port=int(os.environ.get("PORT", 7860)),
     ssr_mode=False,