ServerScriptService is not a valid member of DataModel?

The script works flawlessly with no errors in studio, but when i play in game, i get the error ServerScriptService is not a valid member of DataModel on line 11. Anyone know why?

Local Script

--Libraries
local player = game.Players.LocalPlayer
local char = player.CharacterAdded:wait()
local mouse = player:GetMouse()
local cam = workspace.CurrentCamera
local rs = game:GetService('RunService').RenderStepped
local uis = game:GetService('UserInputService')

--Fundmental Modules
local gs = require(game.ReplicatedStorage.Modules.Fundementals.GameSettings)
local eai = require(game.ServerScriptService:WaitForChild("Modules").Classes.Enemy.EmemyAi)

--Events
local events = game.ReplicatedStorage.Events
local signal = events:WaitForChild("Signal")

--Variables
local ct = 4

--Main
signal.OnClientEvent:connect(function(ver,p1,p2,p3)
	local bdfl = {
		SetupTurret = function()
			local clp = true
			local lastrot = {
				x=0,
				y=0,
				z=0,
			}
			--Cloning
			local t = game.ReplicatedStorage.Assets.Turrets.RTurret:Clone()
			t.Parent = cam
			
			--Input
			uis.InputBegan:connect(function(io,gpe)
				if io.KeyCode == Enum.KeyCode.R and clp == true then
					if t:isA('Model') then
						if t.PrimaryPart ~= nil then
							t:SetPrimaryPartCFrame(t:GetPrimaryPartCFrame()*CFrame.Angles(0,math.rad(5),0))
							lastrot.y = t.PrimaryPart.Rotation.Y
						else
							warn("Set Primary Part to base...")
						end
					elseif t:isA('BasePart') then
					t.CFrame = t.CFrame*CFrame.Angles(0,math.rad(5),0)
					lastrot.y = t.Rotation.Y
					end
				end
			end)
			
			local function castRay(o,o2)
				local mag = (o.PrimaryPart.Position-o2.Position).magnitude
				local beam = Instance.new('Part')
				beam.BrickColor = BrickColor.new('Really Red')
				beam.Material = 'Neon'
				beam.Transparency = 0
				beam.Anchored = true
				beam.CanCollide = true
				beam.Size=Vector3.new(0.3,0.3,mag)
				beam.CFrame=CFrame.new(o.PrimaryPart.Position,o2.Position)*CFrame.new(0,0,-mag/2)
				beam.Parent = cam
				game:GetService("Debris"):AddItem(beam,4)
			end
			
			local function trackEnemies(o)
				local cooldown = 0
				local closestpart
				spawn(function()
					while wait() do
						wait(cooldown)
						if #gs.CurrentCourse.Enemies:GetChildren()~= 0 then
							cooldown = 0
							for n,e in pairs(gs.CurrentCourse.Enemies:GetChildren()) do
								if e ~= nil then
									local mag = (o.PrimaryPart.Position-e.Position).magnitude
									if mag <= 4.5 then
										closestpart = e
									end
								end
							end
								if closestpart then
									castRay(o, closestpart)
									signal:FireServer('Backdoor','DestroyEnemy',closestpart)
									closestpart = nil
									cooldown = ct
								end
							end
						end
					end)
				end			
			
			mouse.Button1Down:connect(function()
				clp = false
				trackEnemies(t)
			end)
			
			mouse.TargetFilter = t
			
			rs:connect(function()
				if clp == true then
						if mouse.Target ~= nil then
							if mouse.Target.Parent.Parent == gs.CurrentCourse then
							signal:FireServer('Backdoor','UpdateTurretPosition',t,
							CFrame.new(mouse.Target.Position.X,((t.PrimaryPart.Size.Y/2)+mouse.Target.Position.Y)+0.5,mouse.Target.Position.Z)*CFrame.Angles(0,lastrot.y,0))
						end
					end
				end
			end)
		end
	}
	if ver == 'Backdoor' then
		bdfl[p1](p2,p3)
	elseif ver == 'Frontdoor' then
		signal:FireServer('Backdoor',p1,p2,p3)
	end
end)

Use game:GetService('ServerScriptService') instead. Sometimes it may not load it right away, so just do that to get it.