Hope this works :)

I'm guessing City State Removal conflicts with one of the following mods, since the game worked once I turned it off. Just thought I'd let you know in case you want to try it yourself. I really want to use this mod.

Civilizations of Warcraft: Darkspear Trolls BNW (v.1)
Civilizations of Warcraft: Kingdom of Stormwind (v.1)
Civilizations of Warcraft: Night Elves (v.1)
Civilizations of Warcraft: Orcs of Durotar (v.1)
Civilizations of Warcraft: Overhaul Project (v.1)
Civilizations of Warcraft: Argent Crusade (v.1)
Civilizations of Warcraft: Blood Elves (v.1)
Civilizations of Warcraft: The Scourge (v.1)
Civilizations of Warcraft: Tauren of Mulgore (v.1)
Eras - Medieval Age (v.15)
Extended Eras (v.10)
PerfectWorld3 (v.1)
Warcraft Blackrock Clan (v.1)
Warcraft Forest Troll (v.1)
Warcraft Forsaken (v.1)

Thank you so much! I've been working on a few mods that add city states and this will no doubt make testing them unbelievably easier.