Cross faction issues

Hello, in config file I set it so cross faction chat and channel is enabled (all 1), but when I invite player to /world it says that he is from wrong alliance and cant join. Also sometimes it happens that players cant whisper me even if whispers are on, it says player not found. How to fix this?

cross faction chat is probably enabled from rbac

How to do that? Im not very pro in this

please anyone?