Stage Selector Not Working

Help and Feedback Scripting Support
#1

Hello! I’ve been working on a difficulty chart obby to test my skills, but there’s something wrong with the stage selector. I want the player to be able to select stages easily. However, the stages will ‘skip’ using the selector. I’ve tried renaming the parts used, but it always breaks after a day! However, there is something very important here. I have a friend who helps me test, and for some reason it doesn’t break on his end! Here’s the code I use to handle the checkpoints when they are touched:

local checkpoints = workspace:WaitForChild("Checkpoints")



print("| Pixel's Checkpoint System Initalized |")

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 tonumber(v.Name) > player.leaderstats.Checkpoint.Value then
					player.leaderstats.Checkpoint.Value = tonumber(v.Name)
				end
				
			end
		end)
	end
end

and what I use for the stage selector:

local UI = script.Parent

local player = game.Players.LocalPlayer

local checkpoints = workspace:WaitForChild("Checkpoints")

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Teleport = ReplicatedStorage:WaitForChild("Teleport")

local Counter = UI:WaitForChild("Counter")
local Level = Counter:WaitForChild("Level")
local Previous = UI:WaitForChild("Previous")
local Next = UI:WaitForChild("Next")
local CurrentValue = UI:WaitForChild("Current")

local function previousLevel()
	if CurrentValue.Value ~= 1 then
		CurrentValue.Value = CurrentValue.Value - 1
		Level.Text = CurrentValue.Value
		-- teleport
		Teleport:FireServer(checkpoints:GetChildren()[CurrentValue.Value])
	end
end

local function nextLevel()
	if CurrentValue.Value ~= #checkpoints:GetChildren() then
		if (CurrentValue.Value + 1) <= player.leaderstats.Checkpoint.Value then
			CurrentValue.Value = CurrentValue.Value + 1
			Level.Text = CurrentValue.Value
			-- teleport
			Teleport:FireServer(checkpoints:GetChildren()[CurrentValue.Value])
		end
	end
end

Previous.MouseButton1Click:Connect(function()
	previousLevel()
end)

Next.MouseButton1Click:Connect(function()
	nextLevel()
end)

-- setup Level
CurrentValue.Value = player:WaitForChild("leaderstats").Checkpoint.Value
Level.Text = CurrentValue.Value

player.leaderstats.Checkpoint:GetPropertyChangedSignal("Value"):Connect(function()
	CurrentValue.Value = player.leaderstats.Checkpoint.Value
	Level.Text = CurrentValue.Value
end)

NOTE: You must know that these scripts are borrowed from Pixel’s Difficulty Chart Obby Kit.
Thanks!