AnimationModule fails to work

Help and Feedback Scripting Support
#1

Hi, I have made this AnimationModule which handles animations easily, rather than me callling an animation on each client script, but it doesn’t seem to work.

Module Script:

local Animations = {}

local Services = {
	RunService = game:GetService("RunService")
}

local CurrentAnimation 
local Heartbeat = Services.RunService.Heartbeat

function Animations:Play(Player, Animation, Duration)
	local Character = Player.Character or Player.CharacterAdded:Wait()
	local Humanoid = Character:WaitForChild("Humanoid")
	
	local Animator = Humanoid:WaitForChild("Animator")
	local Animation = Animator:LoadAnimation(Animation)
	
	if Duration ~= nil and CurrentAnimation == nil then
		Animation:Play(Duration)
		CurrentAnimation = Animation
	elseif Duration == nil and CurrentAnimation == nil then
		Animation:Play()
		CurrentAnimation = Animation
	elseif Duration ~= nil and CurrentAnimation then
		repeat Heartbeat:Wait() until CurrentAnimation == nil
		Animation:Play(Duration)
		CurrentAnimation = Animation
	elseif Duration == nil and CurrentAnimation then
		repeat Heartbeat:Wait() until CurrentAnimation == nil
		Animation:Play()
		CurrentAnimation = Animation
	end
end

function Animations:Stop(Player, Animation, Duration)
	if Duration ~= nil and CurrentAnimation ~= nil then
		CurrentAnimation:Stop(Duration)
		CurrentAnimation = nil
	elseif Duration == nil and CurrentAnimation ~= nil then
		CurrentAnimation:Stop()
		CurrentAnimation = nil
	end
end

return Animations

Client script:

if Back then
AnimationModule:Play(plr, Back, 0.5)
end

Any help would be appreciated, thanks.