It's a server script inside of a module script that is placed in Startergui It works in test solo but not in play FE is on

--Pieces
repeat wait() until script.Parent.Parent.Parent.Parent
wait(.5)
script.Parent.Parent.WelcomeScreen.Welcome:TweenPosition(UDim2.new(0.35, 0,.4, 0),"InOut","Elastic",2.6,false)
local Player = script.Parent.Parent.Parent
local Mouse = Player:GetMouse()
local slab = script.Parent.Parent.Refrences.Slab:Clone()

script.Parent.Parent.WelcomeScreen.Welcome.Enter.MouseButton1Down:connect(function()
	script.Parent.Parent.WelcomeScreen.Welcome:TweenPosition(UDim2.new(0.35, 0,-.25, 0),"InOut","Linear",.6,false)
	wait(.5)
--	script.Parent.Parent.WelcomeScreen.Loading:TweenPosition(UDim2.new(0, 0,-.2, 0),"InOut","Linear",.6,false)
--	wait(3)
--	script.Parent.Parent.WelcomeScreen.Loading:TweenPosition(UDim2.new(0, 0,2, 0),"InOut","Linear",.6,false)
end)

Mouse.Button1Down:connect(function()
	if script.Parent.Parent.MaterialPicker.Placing.Value == true then
		if script.Parent.Parent.MoneyDisplay.PartCount.Count.Value ~= 800 then
		wait(.1)
		local SlabClone = Player.Character.Slab:Clone()
		SlabClone.Parent = game.Workspace
		SlabClone.Transparency = 0
		SlabClone.CanCollide = true
--		script.Parent.Parent.MoneyDisplay.PartCount.Count.Value = script.Parent.Parent.MoneyDisplay.PartCount.Count.Value + 1
--		script.Parent.Parent.MoneyDisplay.PartCount.TextLabel.Text =  script.Parent.Parent.MoneyDisplay.PartCount.Count.Value.."/800"
		end
	end
end)

round = function(N,D) 
	return math.floor((N/(D or 1))+0.5)*(D or 1) 
end 

while true do
	wait(.1)
	if script.Parent.Parent.MaterialPicker.Placing.Value == true then
		slab.Parent = Player.Character
		slab.Transparency = .6
		local material = script.Parent.Parent.MaterialPicker.MainFrame.CurrentMaterial.Value
		local x = math.ceil(Mouse.Hit.p.X)-2
		local z = math.ceil(Mouse.Hit.p.Z)-2
		x1 = x%4
		z1 = z%4
		x2 = x + (4 - x1)
		z2 = z + (4 - z1)
		slab.CFrame = CFrame.new(x2,round(Mouse.Hit.p.Y,.1)+.3,z2)
		slab.Material = Enum.Material[material]
		slab.CanCollide = false
	else
		slab.Transparency = 1
	end
Anonymous