iOS AR app rejected. use of private scheme. PLEASE advice

I received the following rejection email from Apple for an ARkit app build with Unreal 4.24:

Your app uses the “prefs:root=” non-public URL scheme, which is a private entity. The use of non-public APIs is not permitted on the App Store because it can lead to a poor user experience should these APIs change.

Specifically, your app uses the following non-public URL scheme:


Continuing to use or conceal non-public APIs in future submissions of this app may result in the termination of your Apple Developer account, as well as removal of all associated apps from the App Store.

Everything in the app is blueprint based and I am building with Distribution mode so please advice me on how I can disable this!

thank you