Why does my script not work when i publish it and play the game?

so i have a script for a global leaderboard script which works in studio just fine but when i publish the game and play it, the leaderboard just sends me an error.

the script:

local Leader1 = game:GetService("DataStoreService"):GetOrderedDataStore("XPs")
 
local function Handler()
    local Success, Err = pcall(function()
        local Data1 = Leader1:GetSortedAsync(false, 15)
        local PrestigePage1 = Data1:GetCurrentPage()
        for Rank, Data in ipairs(PrestigePage1) do
            local Name = Data.key
            local Prestige = Data.value
            local PlaceMent = game.ReplicatedStorage:WaitForChild("lbFrame"):Clone()
			local playerid = game.Players:GetUserIdFromNameAsync(Name)
			local player = game.Players:GetPlayerByUserId(playerid)
            PlaceMent.Player.Text = Name
            PlaceMent.XP.Text = Prestige
			PlaceMent.Rank.Text = player:WaitForChild("leaderstats").Rank.Value
            PlaceMent.Place.Text = "#"..Rank
            PlaceMent.Position = UDim2.new(0, 0, PlaceMent.Position.Y.Scale + (0.08 * #game.Workspace.GlobalLeaderboard.lbGUI.Holder:GetChildren()), 0)
            PlaceMent.Parent = game.Workspace.GlobalLeaderboard.lbGUI.Holder
        end
    end)
    if not Success then
        error(Err)
    end
end
 
while true do
    for _,Player in pairs(game.Players:GetPlayers()) do
        Leader1:SetAsync(Player.Name, Player.leaderstats.XP.Value)
    end
    for _,v in pairs(game.Workspace.GlobalLeaderboard.lbGUI.Holder:GetChildren()) do
        if v.Name == "lbFrame" then
            v:Destroy()
        end
    end
    Handler()
    wait(20)
end

the error im getting is: serverscriptservice.Globalleaderboardscript1:15: attempt to index nil with 'WaitForChild'

i know this has something to do with roblox properties but im not sure how to fix it.