Rpg XP giving script help?

Ok This Script is based on the roblox set leaderboard but i modified it a bit but it seems there are errors found please if you can help me that be great.

--rbxsig%XYC6H9oKVLF//1itmbaGn5wI5a4YNtkf4beIsIVZsrT29WveOsrP4YfpYDED5Xa8A1oBA/5oDwtjy4/wlvl/DH0rigLCzfNVjszNya26GajrkOvCFifnNhOCVAOLBySGJ7z5gMoZR/XQjW5EO+K1zDWiQi5CLNwBOxOTMDLS8dU=%
--rbxassetid18966%
print("LinkedLeaderboard script version 5.00 loaded")

stands = {}


function onHumanoidDied(humanoid, player)
	local stats = player:findFirstChild("leaderstats")
	if stats ~= nil then

		-- do short dance to try and find the killer

		local killer = getKillerOfHumanoidIfStillInGame(humanoid)

		handleKillCount(humanoid, player)
	end
end

function onPlayerRespawn(property, player)
	-- need to connect to new humanoid
	
	if property == "Character" and player.Character ~= nil then
		local humanoid = player.Character.Humanoid
			local p = player
			local h = humanoid
			humanoid.Died:connect(function() onHumanoidDied(h, p) end )
	end
end

function getKillerOfHumanoidIfStillInGame(humanoid)
	-- returns the player object that killed this humanoid
	-- returns nil if the killer is no longer in the game

	-- check for kill tag on humanoid - may be more than one - todo: deal with this
	local tag = humanoid:findFirstChild("creator")

	-- find player with name on tag
	if tag ~= nil then
		
		local killer = tag.Value
		if killer.Parent ~= nil then -- killer still in game
			return killer
		end
	end

	return nil
end

function handleKillCount(humanoid, player)
	local killer = getKillerOfHumanoidIfStillInGame(humanoid)
	if killer ~= nil then
		local stats = killer:findFirstChild("leaderstats")
		if stats ~= nil then
			local kills = stats:findFirstChild("XP")
			if killer ~= player then
				kills.Value = kills.Value + 10
				
			end
		end
	end
end