Script works fine on studio play mode, but breaks partially when in-game?

I am making a tower defense style game, and I made a minigunner tower for testing. But I am having a big problem.

On studio play mode, the tower's script works perfectly fine. But when in-game or on studio test mode, it breaks partially and the shoot() function doesn't fire for some reason.

Script:

--//Services
local players = game:GetService("Players")
local debris = game:GetService("Debris")

--//Variables
local tower = script.Parent.Parent

local towerHumanoidRootPart = tower:WaitForChild("HumanoidRootPart")
local humanoid = tower:WaitForChild("Humanoid")
local minigun = tower:WaitForChild("Minigun")

local storage = tower:WaitForChild("Storage")

local animations = storage:WaitForChild("Animations")
local idleAnimation = animations:WaitForChild("Idle")

local soundEffects = storage:WaitForChild("SoundEffects")
local gunshotSFX = soundEffects:WaitForChild("GunshotSFX")

local statistics = require(storage:WaitForChild("TowerStatistics"))
local range = statistics["Range"]
local fireRate = statistics["FireRate"]
local damage = statistics["Damage"]

--//Functions
local function generateRangeMarker()
	local rangeMarker = Instance.new("Part")
	rangeMarker.Anchored = true
	rangeMarker.CanCollide = false
	rangeMarker.CFrame = towerHumanoidRootPart.CFrame *CFrame.new(0, -1.75, 0) *CFrame.Angles(0, 0, math.rad(90))
	rangeMarker.Size = Vector3.new(.1, range * 2, range * 2)
	rangeMarker.BrickColor = BrickColor.new("Deep blue")
	rangeMarker.Transparency = .5
	
	local rangeMarkerMesh = Instance.new("SpecialMesh", rangeMarker)
	rangeMarkerMesh.MeshType = Enum.MeshType.Cylinder
	
	rangeMarker.Parent = tower
end

local function startAnimation()
	wait()
	humanoid:LoadAnimation(idleAnimation):Play()
end

local function shoot() --//The function that breaks when in-game.
	while wait(fireRate) do
		local playerList = players:GetPlayers()
		
		for i = 1, #playerList do
			local target = workspace:FindFirstChild(playerList[i].Name)
			if not target then return end
			
			local targetHumanoid = target:FindFirstChild("Humanoid")
			if not targetHumanoid then return end
			
			local targetHumanoidRootPart = target:FindFirstChild("HumanoidRootPart")
			if not targetHumanoidRootPart then return end
			
			local magnitude = (towerHumanoidRootPart.CFrame.p - targetHumanoidRootPart.CFrame.p).magnitude
			
			if magnitude < range then
				towerHumanoidRootPart.CFrame = CFrame.new(towerHumanoidRootPart.CFrame.p, targetHumanoidRootPart.CFrame.p)
				towerHumanoidRootPart.Orientation = Vector3.new(0, towerHumanoidRootPart.Orientation.Y, towerHumanoidRootPart.Orientation.Z)
				
				targetHumanoid:TakeDamage(damage)
				
				local newGunshotSFX = Instance.new("Sound")
				newGunshotSFX.Name = "ClonedGunshotSFX"
				newGunshotSFX.SoundId = gunshotSFX.SoundId
				
				newGunshotSFX.Parent = minigun
				newGunshotSFX:Play()
				
				debris:AddItem(newGunshotSFX, 1)
			end
		end
	end
end

--//Callers
generateRangeMarker()
startAnimation()
shoot() --//The caller for the shoot() function.

This is the 3rd/4th time I am asking this, I didn't get a answer on the other times I asked this same question.