Why isn't this Skip Stage button teleporting me to the next Checkpoint? What's wrong?

I am making a Skip Stage for my Obby and I have a Skip Stage feature. I have a screen GUI --> TextButton --> Local Script.

I have named the checkpoints as for example, the first checkpoint will be called 1, the next checkpoint 2 and so on.

I do have a touch handler script in the Checkpoints folder which runs when a checkpoint is touched. It is as follows:

local Checkpoints = script.Parent

for i,v in pairs(Checkpoints:GetChildren()) do
	if v:IsA("BasePart") then
		v.Touched:Connect(function(hit)
			
			if hit.Parent:FindFirstChild("Humanoid") then
				
				local player = game.Players:GetPlayerFromCharacter(hit.Parent)
				if player then
					if player.leaderstats.Checkpoint.Value < tonumber(v.Name) then
						player.leaderstats.Checkpoint.Value = tonumber(v.Name)
					end
				end
			end
		end)
	end
end

The Local Script which is inside the text button (which should teleport me to the next Checkpoint) is causing out an error. It increases my leaderstats.Checkpoint's Value but just doesn't Teleport me.

local player = game.Players.LocalPlayer
local leaderstats = player:WaitForChild("leaderstats"):FindFirstChild("Checkpoint") 
local hasLimits = true
local Limits = 3

script.Parent.MouseButton1Click:connect(function()
	if hasLimits == true then
		if Limits ~= 0 then
			Limits = Limits - 1
			script.Parent.Text = "Skip Stage ("..Limits..")"
			leaderstats.Value = leaderstats.Value + 1
			if player ~= nil then
				if player.Character ~= nil then
					if player.Character:FindFirstChild("Humanoid").Health > 0 then
						player.Character.HumanoidRootPart.CFrame = game.Workspace:FindFirstChild(leaderstats.Value).CFrame + Vector3.new(0,3,0)
					end
				end
			end
		end
	else
		if player ~= nil then
			if player.Character ~= nil then
				if player.Character:FindFirstChild("Humanoid").Health > 0 then
					player.Character.HumanoidRootPart.CFrame = game.Workspace:FindFirstChild(leaderstats.Value).CFrame + Vector3.new(0,3,0)
				end
			end
		end
	end
end)

And in the output is says "Players.Soban06.PlayerGui.ScreenGui.TextButton.LocalScript:15: attempt to index nil with 'CFrame'".

Please tell me how to fix this.

Thanks