Need help with this script on picking up "Item"?? The game freezes?

Alright so I have this script, but when I try to test in studio, the game freezes and this call stack bar shows up. It points to this script, it also asks me to break or kill the script. I don't know what is wrong please help lol.

local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()
local key = "f"
local sound = game.Workspace:WaitForChild("pickup")
local playerGui = plr:WaitForChild("PlayerGui")
local inventory = playerGui:WaitForChild("Inventory")
local InvService = require(inventory.InventoryService)
local PickupImage = "http://www.roblox.com/asset/?id=1476363789"

spawn(function()
	while wait() do
		if mouse.Target then
			if mouse.Target:FindFirstChild("item") then
				mouse.Icon = PickupImage
			else
				mouse.Icon = ""
			end
		else
			mouse.Icon = ""
		end
	end
end)

mouse.KeyDown:connect(function(k)
	if k:lower() == key then
		if mouse.Target then
			if mouse.Target:FindFirstChild("item") then
				local result = InvService.addOneItem(mouse.Target.Name)
				if result then
					sound:Play()
					game.ReplicatedStorage.Events.dest:FireServer(mouse.Target)
				end
			end
		end
	end
end)