can't initialize character on client

[ap0sentada]

for some reason, my wcs is always crashing on init.

init code:
(running on server)

function CombatService._CharacterAdded(self: self, model: Model, player: Player)
	local oldCharacter = self.Wrappers[player];
	if oldCharacter then oldCharacter:Destroy() end
	self.Wrappers[player] = nil;
	if not model then return end
	local humanoid = model:FindFirstChildWhichIsA("Humanoid")
	warn("creating a wcs char for", model)
	self.Wrappers[player] = WCSCharacter.new(model);
	humanoid.Died:Once(function()
		local char = self.Wrappers[player];
		if char then char:Destroy() end
	end)

	for _, skill in pairs(self.Skills[player] or {}) do
		skill:Destroy()
	end
	self.Skills[player] = {}
	-- setup
	self:SetupKatana(player)

end

model = player.Character
output