[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