A help with batman-adv

Good evening everyone
I'm not an experienced user, just curious.
I would like some help with a mesh network with batman protocol on an eap225. i own two eap225.
I managed to configure the mesh between the two eap225 following Carlos Gomes' tutorial https://cgomesu.com/blog/Mesh-networking-openwrt-batman/#initial-configuration.
My problem is not being able to exit to the internet through the mesh's wifi point.
could someone give me a hand?