Why does my teleport script work in studio when testing, but not in actual servers?

I have this teleport script that runs every 60 seconds, but for some odd reason, it doesn't teleport anyone in an actual server, even though it does work while testing in studio.

function tp()
    local teleport = Vector3.new(0,2,0)
    local players = game.Players:GetChildren()
    for i = 1, #players do
        local player = players[i]
        local humanoidrootpart = player.Character:FindFirstChild("HumanoidRootPart")
        humanoidrootpart.CFrame = CFrame.new(teleport)
        teleport = teleport + Vector3.new(0,5.5,0)
    end
end

It worked fine before I added

teleport = teleport + Vector3.new(0,5.5,0)

and moved

local teleport = Vector3.new(0,2,0)

into the function (it was outside before) but I don't understand how that would ruin the script.