Why won't this TextButton script work after i die and respawn?

this is a simple skip stage button. This script is inside the button itself

local MarketplaceService = game:GetService("MarketplaceService")
local ds = game:GetService("DataStoreService"):GetDataStore("PurchaseHistory")
local productId = 50041340

MarketplaceService.ProcessReceipt = function(receiptInfo) 

    for i, player in ipairs(game.Players:GetChildren()) do
        if player.userId == receiptInfo.PlayerId then

            if receiptInfo.ProductId == productId then
                local stats = player:WaitForChild("leaderstats")
                player.leaderstats.Stage.Value = player.leaderstats.Stage.Value + 1
                wait()
                local stage = game.Workspace:WaitForChild(stats.Stage.Value)                
                wait(1)
                player.Character.Humanoid.Torso.CFrame = stage.CFrame + Vector3.new(0,3,0)
            end
        end
    end 

    local playerProductKey = "player_" .. receiptInfo.PlayerId .. "_purchase_" .. receiptInfo.ProductId
    ds:IncrementAsync(playerProductKey, 1)  

    return Enum.ProductPurchaseDecision.PurchaseGranted     
end

This is a localscript inside the starterpack that fires first when a player clicks on the button

local player = game.Players.LocalPlayer
local buyButton = player.PlayerGui:WaitForChild("ScreenGui").SkipStage
local productId = 50041340

-- when player clicks on buy brick prompt him/her to buy a product
buyButton.MouseButton1Click:connect(function()
    game:GetService("MarketplaceService"):PromptProductPurchase(game.Players.LocalPlayer, productId)
end)

also i'm not sure if it's related i'm using this script to delay the respawn of players after death to allow time for my checkpoint script to run

game.Players.PlayerAdded:connect(function(p) 
        p.CharacterAdded:Connect(function(Character)
                    local Humanoid = Character:FindFirstChild("Humanoid")
        if Humanoid then
            Humanoid.Died:connect(function()
                wait(respawnTime)
                p:LoadCharacter()
            end)

Thanks for your time