How to fix a game pass tool script after multiple attempts?

The issue is what you are doing at the bottom of the code you never call the function in the first place. You are trying to call the function. I just rewrote your entire code because I'm bored. Either use it or just look at what I did and try to see what is wrong. For the future I also recommend you to use print to found out what the error is.

local ServerStorage = game:GetService("ServerStorage")
local MarketplaceService = game:GetService("MarketplaceService")
local Players = game:GetService("Players")

local GamepassId = 5053560 --Put that id here 
local ToolNames = {"InfinityRides"}
local ToolsParent = ServerStorage

game.Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(character)
		print("Checking if ".. player.Name.. " owns the gamepass with the id of ".. GamepassId)
		if MarketplaceService:UserOwnsGamePassAsync(player.UserId, GamepassId) then
			print("The player ".. player.Name.. " owns the gamepass with the id of ".. GamepassId)
			for i, v in pairs(ToolNames) do
				print("Looking for the tools to give the player ".. player.Name)
				if ServerStorage:FindFirstChild(v) then
					print("Found tool to give the player ".. player.Name)
					local ClonedTool = ServerStorage:FindFirstChild(v):Clone()
					ClonedTool.Parent = player.Backpack
				end
			end
		end
	end)
end)