Problem getting datum gateway running on start9 with Bitcoin knots

Hey I’m trying to run datum, and have defaults on knots and datum, and I did the auto config that datum requested of knots. it tries running and then stops and the logs of datum show this error.
Knots and electrum and mempool all work fine.
Error log on datum gateway
2026-01-24T06:56:02+08:00 Error: The blocknotify field is null or not set in Bitcoin’s configuration. Your Start9 Bitcoin package may not support adding this. Knots is required.