Facebook login with Firebase

HI guys,

I’m trying to set up a Facebook login following the instructions on Firebase (Agrega acceso a tu app para iOS fácilmente con FirebaseUI  |  Firebase Documentation). I get the following error when I click the Facebook button “App ID not found. Add a string value with your app ID for the key FacebookAppID to the Info.plist or call Settings.shared.appID”. After a bit of searching around it seems others have fixed this using an AppDelegate, however that is for a custom login rather than the Firebase one. Any ideas? or anyone else experienced this?

Thanks,

James