I keep getting this error, attempt to index field 'LocalPlayer' (a nil value). Help??

I made a treadmill that works and I made a leaderboard

game.Players.PlayerAdded:Connect(function(plr)
	local folder = Instance.new("Folder",plr)
	folder.Name = "leaderstats"
	local speed = Instance.new("IntValue",folder)
	speed.Name = "Speed"
	speed.Value = 1
end)

Then I made this

local speed = game.Players.LocalPlayer.folder.speed
local conveyor = game.Workspace.Treadmill.Conveyor

conveyor.Touched:Connect(function(hit)
	if hit ~= nil then
		while true do
			if hit.Parent ~= nil then
				if hit.Parent.Character ~= nil then
					if hit.Parent.Character.Health ~= 0 then
						wait(2)
						speed.Value = speed.Value + 2
					end
				end
			end
		end
	end
end)

But it says attempt to index field 'LocalPlayer' (a nil value)

Please help?

I'm not entirely sure, but this might be an easy fix if you make a line at the start of the second script (which is hopefully a local script) that waits for the local player's character to load.

repeat wait() until game.Players.LocalPlayer.Character

local speed = game.Players.LocalPlayer.folder.speed
local conveyor = game.Workspace.Treadmill.Conveyor
	 
conveyor.Touched:Connect(function(hit)
    if hit ~= nil then
        while true do
            if hit.Parent ~= nil then
                if hit.Parent.Character ~= nil then
                    if hit.Parent.Character.Health ~= 0 then
                        wait(2)
                        speed.Value = speed.Value + 2
                    end
                end
            end
        end
    end
end)