It might be either the Community Patch and/or Enhanced Building Collection. This mod doesn't have support for those.

@SilentSkye I am using the Community Patch, New and Enhanced building collection, Only Mod Civs and various other Fire Emblem Civs from Tellius (Begnion, Crimea, Daein,Gallia, Goldoa, Serenes). I'm also using Starting Scout and Starting Worker. I hope that helps :)

Working fine for me. I am playing a game against Tibarn (AI). However I use the barbarian inmersion (sic) mod, and the barbarians wiped him out. But because I am playing as Gilgamesh, I was able to build Hawk Laguz. Fun, fun, FUN!

@Search I don't have the same issue as you are with using only the two mods you stated. What other mods were you using?

Using this mod with Nailah of Hatari seems to make the game crash. Not sure what is causing it.

Fun to play. The hawks are great & upgrade to Knights with free movement (except Mountains & Ice until promotion). Indeed if you fly them to Kilimanjaro, & get an extra movement promotion, the knights can travel up to 10 hill hexes! With the Sea bonus they are almost OP. If you are playing against this Civ (AI), the sea movement bonus will gobble up goody huts before you do (& vis a versa).

unique building is weak. it shoul add more yields to coast and ocean tiles.