ReplicatedStorage.ModuleScript:4:attempt to index local 'player' (a nil value), doesn't work ingame?

The module script & script I made both work in studio, but not ingame (the script I presume because it can't call the module script because of the error in the module script).

Module script:

local module = {}

local player = game.Players:WaitForChild("LocalPlayer")
local leaderstats = player:WaitForChild("leaderstats")
module.giveChickenEaten = function(chicken, chickenIntValue, biteAmountInt)
	--2
	--1
	print("Calculating chicken eaten...")
	print(chickenIntValue)
	leaderstats["Chicken Eaten"].Value = leaderstats["Chicken Eaten"].Value + chickenIntValue
	biteAmountInt.Value = biteAmountInt.Value - 1
	print(biteAmountInt.Value)
	if biteAmountInt.Value == 0 then
		chicken:Destroy()
	end
end

return module

Script (located inside a tool)

local Tool = script.Parent;

enabled = true




function onActivated(player)
	if not enabled  then
		return
	end

	enabled = false
	Tool.GripForward = Vector3.new(0.675, -0.675, -0.3)
	Tool.GripPos = Vector3.new(0.4, -0.59, 1.1)
	Tool.GripRight = Vector3.new(0.212, -0.212, 0.954)
	Tool.GripUp = Vector3.new(0.707, 0.707, 0)

	wait(.8)
	
	local h = Tool.Parent:FindFirstChild("Humanoid")
	if (h ~= nil) then
		if (h.MaxHealth > h.Health + 1.6) then
			h.Health = h.Health + 1.6
		else	
			h.Health = h.MaxHealth
		end
	end

	Tool.GripForward = Vector3.new(-0.976,0,-0.217)
	Tool.GripPos = Vector3.new(0, -0.4, 0)
	Tool.GripRight = Vector3.new(0.217,0,-0.976)
	Tool.GripUp = Vector3.new(0,1,0)
	
	--where i want to activate the modulescript
	
	local module1 = require(game.ReplicatedStorage.ModuleScript) 
	module1.giveChickenEaten(script.Parent, script.Parent.coldFriedChickenValue.Value, 	
        script.Parent.biteAmount)


	enabled = true

end



script.Parent.Activated:connect(onActivated)

Your script doesn't work because the module script does not access players. Instead pass player = game.Players.LocalPlayer to the module script.

-- Module Script Function
module.giveChickenEaten = function(player,chicken, chickenIntValue, biteAmountInt)
    print("Calculating chicken eaten...")
    print(chickenIntValue)
    leaderstats["Chicken Eaten"].Value = leaderstats["Chicken Eaten"].Value + chickenIntValue
    biteAmountInt.Value = biteAmountInt.Value - 1
    print(biteAmountInt.Value)
    if biteAmountInt.Value == 0 then
        chicken:Destroy()
    end
end

--Script located inside a tool 
local player = script.Parent.Parent
local module1 = require(game.ReplicatedStorage.ModuleScript) --where the module script is activated
module1.giveChickenEaten(player,script.Parent, script.Parent.coldFriedChickenValue.Value, script.Parent.biteAmount)