Need help with my running animation debounces

I have a left shift prompted running script here and I would like the character to play the running animation when shift is toggled and stop when released, however I’m having trouble with stopping the animation when shift is released.
Here’s the local script:

local UIS = game:GetService("UserInputService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")

UIS.InputBegan:Connect(function(Input)
	if Input.KeyCode == Enum.KeyCode.LeftShift then
		ReplicatedStorage.RemoteEvents.Sprint:FireServer("StartedState")
	end
end)

UIS.InputEnded:Connect(function(Input)
	if Input.KeyCode == Enum.KeyCode.LeftShift then
		ReplicatedStorage.RemoteEvents.Sprint:FireServer("EndedState")
	end
end)

ReplicatedStorage.RemoteEvents.StaminaUpdate.OnClientEvent:Connect(function(Stamina,MaxStamina)
	Players.LocalPlayer.PlayerGui.Stamina.StaminaBar.Size = UDim2.new(0.1,(Stamina/MaxStamina) * 410,0,31)
	
end)

Here’s the part of the script:

ReplicatedStorage.RemoteEvents.Sprint.OnServerEvent:Connect(function(Player,State)
	local Humanoid = Player.Character.Humanoid
	local RunAnimation = Instance.new("Animation")
	RunAnimation.AnimationId = 'rbxassetid://6059811537'
	local LoadRunAnimation = Humanoid:LoadAnimation(RunAnimation)
	LoadRunAnimation.Priority = Enum.AnimationPriority.Movement
	if State == "StartedState" and Humanoid:GetState() == Enum.HumanoidStateType.RunningNoPhysics and Humanoid.MoveDirection.Magnitude > 0 then
		SprintingPlayers[Player.Name] = Humanoid.WalkSpeed
		Humanoid.WalkSpeed = Humanoid.WalkSpeed * SprintModifier
		if SprintingPlayers[Player.Name] then
		 LoadRunAnimation:Play()
		end
		elseif
		State == "EndedState" and SprintingPlayers[Player.Name] then
		Humanoid.WalkSpeed = SprintingPlayers[Player.Name]
		SprintingPlayers[Player.Name] = nil
	end
	if SprintingPlayers[Player.Name] == nil then
		LoadRunAnimation:Destroy()
	end
end)

I’ve tried placing debounces, more conditional statements but none worked. Should I even play the animation in this function of the script or in the heartbeat function that runs later down the script?

You’ll need to show to local script

Humanoid:LoadAnimation() is now deprecated. Use Animator, a child of the humanoid of a player’s character model, Animator:LoadAnimation() instead for alternative.

What? When did it get deprecated?
Man that sucks that it got deprecated, every time i feel i got a rough grasp on scripting, code gets deprecated, it’s annoying.

Hi, I edited the local script in.