The post Lua.log on CivFanatics and go have a beer Lua error? In that case I can't help you, that's a mod bug. All I know is how to load the game and get it running, the Lua is Sir Pazyryk's demesne.
It probably is in the Lua.log, but what happened immediately before you got the message? Any particular unit action/technology unlock/building completed/spell cast?