Use flagging_mode instead

app.py

@@ -234,7 +234,7 @@ Pair2Rank uses the [Evalica](https://pypi.org/p/evalica) library for computing t
 
 Read more about Pair2Rank at <https://evalovernite.substack.com/p/llmfao-human-ranking>.
         """.strip(),
-        allow_flagging="never",
+        flagging_mode="never",
     )
 
     iface.launch()