How come this Creative Block Inventory Work? (solved)

I was working on my script There was no errors but it does not create any of the Buttons! Why doesn't it work? (i have only included the part of the script that errors) EDIT: I included the full Script

--[[--[[--[[--[[
Setup Everything
--]]--]]--]]--]]
local mouse = game:GetService('Players').LocalPlayer:GetMouse()
local HotbarItems = {'Grass','Stone','Dirt','Sand','TorchWall','MoltenRock','Netherrack','Water','Lava'}
local ItemList = {'SpawnZombie','Fire','NetherPortal','Grass','Dirt','Stone','Bedrock','DiamondOre','CopperOre','IronOre','EmeraldOre','GoldOre','RedstoneOre','MoltenRock','Bricks','Leaves','WoolDarkGray','WoolOrange','WoolGray','WoolBrown','WoolDarkGreen','WoolLightGreen','WoolGreen','WoolBlue','WoolLightBlue','WoolLightYellow','SpruceWood','OakWood','DarkOakWood','AcaciaWood','AcaciaWoodPlanks','DarkOakWoodPlanks','OakWoodPlanks','SpruceWoodPlanks','Concrete','Cobblestone','Sand','Gravel','Netherrack','WoolRed','Water','Lava'}
local Selected = 1
local SpecialPlayers = {[148430515]='Co-Founder',[34929389]='Founder/Lead Developer'}
local PlayerColors = {[148430515]=Color3.new(255,170,0),[34929389]=Color3.new(255,0,0)}
game:GetService('Players').LocalPlayer.CharacterAdded:connect(function()
	game:GetService('Players').LocalPlayer.Character:WaitForChild('Humanoid')
	PunchAnim = game:GetService('Players').LocalPlayer.Character.Humanoid:LoadAnimation(script.Punch)
	PlaceAnim = game:GetService('Players').LocalPlayer.Character.Humanoid:LoadAnimation(script.Place)
end)
--[[--[[
Functions
--]]--]]
function CreativeItemClick(Button)
	Button.MouseButton1Click:connect(function()
		HotbarItems[Selected] = Button.ItemTag.Value
	end)
end
--[[
Chat
--]]

--[[--[[--[[--
Hotbar/Blocks
--]]--]]--]]--
mouse.Button1Down:connect(function()
	local target = mouse.Target
	PunchAnim:Play()
	if target.Parent:FindFirstChild('Humanoid') then
		target.Parent.Humanoid:TakeDamage(10)
		if target.Parent.Torso:FindFirstChild('Damaged') then
			target.Parent.Torso.Damaged:Play()
		else
			local Damaged = game:GetService('Lighting').Damaged:Clone()
			Damaged.Parent = target.Parent.Torso
			target.Parent.Torso.Damaged:Play()
		end
	end
	for index, value in ipairs(ItemList) do
		if target.Name == value then
			target:Destroy()
		end
	end
end)
mouse.Button2Down:connect(function()
	PlaceAnim:Play()
	local PlacedObjectIdentifier = HotbarItems[Selected]
	if HotbarItems[Selected] == 'SpawnZombie' then
		local Zombie = game:GetService('ReplicatedStorage').Mobs.Zombie:Clone()
		Zombie.Parent = game:GetService('Workspace')
		local p=mouse.Hit.p
		local x,y,z = p.x,p.y,p.z
		-- Added stuff
		local xdif = math.floor(x/4+.5)*4  -- Grids positions X value (0,4,8,12,16 etc)
		local ydif = math.floor(y/4+.5)*4  -- Grids positions Y value (0,4,8,12,16 etc)
		local zdif = math.floor(z/4+.5)*4  -- Grids positions Z value (0,4,8,12,16 etc)
		Zombie:MoveTo(Vector3.new(xdif,ydif,zdif))  
	else
		local ClonedBlock = game:GetService('Lighting'):FindFirstChild(PlacedObjectIdentifier):Clone()
		ClonedBlock.Parent = game:GetService('Workspace')
		local p=mouse.Hit.p
		local x,y,z = p.x,p.y,p.z
		-- Added stuff
		local xdif = math.floor(x/4+.5)*4  -- Grids positions X value (0,4,8,12,16 etc)
		local ydif = math.floor(y/4+.5)*4  -- Grids positions Y value (0,4,8,12,16 etc)
		local zdif = math.floor(z/4+.5)*4  -- Grids positions Z value (0,4,8,12,16 etc)
		ClonedBlock.CFrame = CFrame.new(xdif,ydif,zdif)
	end
end)
--[[--[[
Functions
--]]--]]
mouse.KeyDown:connect(function(key)
	local n=tonumber(key)
	if n then
		Selected = n
		script.Parent.Hotbar.Selecter:TweenPosition(UDim2.new((n-1)/10,0,0,0))
	end
end)
game:GetService('RunService').RenderStepped:connect(function()
	wait(.1)
	for i = 1, 9 do
		script.Parent.Hotbar["Slot"..i].Text = HotbarItems[i]:sub(1,2):upper()
	end
end)
--[[--[[--[
Inventories
--]]--]]--]
Row = 0
MaxSlotsPerRow = 9
Slot = 0
LastSlot = nil
script.Parent:WaitForChild('CreativeInventory')
for index, value in ipairs(ItemList) do
	Slot = Slot + 1
	local BlockName = string.sub(value,1,2)
	local BlockTag = string.upper(BlockName)
	BlockButton = game:GetService('Lighting').Item:Clone()
	BlockButton.Parent = script.Parent.CreativeInventory.Blocks
	if LastSlot == nil then
		BlockButton.Position = UDim2.new(0, BlockButton.Position.X.Offset + 25, 0, Row)
	else
		BlockButton.Position = UDim2.new(0, LastSlot.Position.X.Offset + 25, 0, Row)
	end
	BlockButton.Text = BlockTag
	BlockButton.ItemTag.Value = value
	CreativeItemClick(BlockButton)
	LastSlot = BlockButton
	if Slot >= MaxSlotsPerRow then
		Row = Row + 0.1
		Slot = 0
		BlockButton.Position = UDim2.new(0,0,Row,0)
	end
end