CFrame is not valid member of localscript, what to do?

I was trying to make a Fireball that hits the nearest body.

The script:

local Bloom1 = game:GetService("ServerStorage").Bloom1

local Bloom1Speed = 100
local Bloom1Lifetime = 5
local Bloom1Damage = 16
local hitbox = 5
local Bloom1cooldown = 0
local canshoot = true
function findTorsoNearest(position)
	local list = workspace.Zombie:GetChildren()
	local filteredlist = {}
	for _, v in pairs(list) do
		if game.Players:GetPlayerFromCharacter(v) == nil and v:FindFirstChild("Humanoid") then
			table.insert(filteredlist, v.Torso)
		end
	end
	local ClosestTorso = nil
	local Distance = nil
	for _, v in pairs(filteredlist) do
		if Distance == nil then
			Distance = (v.Position - position).magnitude
			ClosestTorso = v.Torso
			continue
		elseif  (v.Position - position).magnitude < Distance then
			ClosestTorso = v.Torso
			Distance = (v.Position - position).magnitude
		end
	end
	return ClosestTorso
end
script.Parent.Fire.OnServerEvent:Connect(function(player)
	if not canshoot then return end
	canshoot = false
	**local closestTorso = findTorsoNearest((script.Parent.CFrame * CFrame.new(0, 0, -5)).p)**
	local root = player.Character.HumanoidRootPart
	local fb = Bloom1:Clone()
	fb.CFrame = root.CFrame
	local rocketpropal = Instance.new("RocketPropulsion")
	rocketpropal.CartoonFactor = 1
	rocketpropal.TargetRadius = hitbox
	rocketpropal.MaxSpeed = Bloom1Speed
	rocketpropal.MaxTorque = Vector3.new(40,40,0)
	rocketpropal.MaxThrust = 5000
	rocketpropal.ThrustP = Bloom1Speed
	rocketpropal.ThrustD = 0.5
	rocketpropal.Target = closestTorso
	rocketpropal.Parent = fb
	fb.Parent = workspace
	rocketpropal:Fire()
	local alreadyhit = false
	rocketpropal.ReachedTarget:Connect(function()
		closestTorso.Parent.Humanoid:TakeDamage(Bloom1Damage)
		fb:Destroy()
	end)
	game.Debris:AddItem(fb, Bloom1Damage)
	delay(Bloom1cooldown, function() canshoot = true end)
end)

The error is in the title... what to do?

Bloom1 -- is a fireball. Zombie is a file.