[Coroutines] Thread Manager? Help?

So I am on a quest to make a functional thread manager. It can re-use threads that are cached in a table that can be pulled at any time. So I'm testing it with some lighting and boolean's and the module that controls the lighting requires a boolean to turn on/off the lights. But I keep running into an error. The thread does run but doesn't seem to operate and errors.

Any ideas?

local _ModuleEffects = script.Parent:WaitForChild("Effects")
local _COMMANDS = {}
local _THREADS = {}

-- Threading --

local AddNewThread = function(EffectName, ...)
	local NewThread = coroutine.create(...)
	_THREADS[EffectName] = NewThread
	return NewThread
end

local FindOldThread = function(EffectName, ...)
	if _THREADS[EffectName] ~= nil then
		return _THREADS[EffectName]
	else
		return false
	end
end

local RemoveThread = function(EffectName, ...)
	local Thread = FindOldThread(EffectName)
	if Thread ~= false then
		_THREADS[EffectName] = nil
	end
	return _THREADS[EffectName]
end

local ThreadStatus = function(EffectName, ...)
	local Thread = FindOldThread(EffectName)
	if Thread ~= false then
		return(EffectName.." status: "..tostring(coroutine.status(Thread)))
	end
end

local RunThread = function(EffectName, ...)
	local Thread = FindOldThread(EffectName)
	if Thread ~= false then
		coroutine.resume(Thread)()(...)
		print("Running thread "..EffectName)
	else
		local Module = _ModuleEffects:FindFirstChild(EffectName,true)
		if Module then
			AddNewThread(EffectName, require(Module))
			print("Created new thread for "..EffectName)
		end
	end
end

-- Returning functions to operate --

return RunThread