The animation of the tools won't play, but plays during testing In roblox studio, Why Is that?

As the name says, I made a couple of tools that has there animations stop working but works when testing In roblox studio, an example Is a wooden sword that plays a slash animation, and while doing that It stuns users for a long time, more longer than the swords cooldown, letting you stun lock them, most of the scripts work, only the animation doesn't work (Like I made a sword that has a custom slash animation, and during the slash animation It damages players and NPCS, the damage script works, just not the animation during Ingame)

Wooden sword script:

local tool = script.Parent
local Debounce = false
local CanDamage = false
local Slash = tool.Slash
local AbilityDebounce = false
local Sounds = {
	Damage = tool.Damage,
	Woosh = tool.Woosh,
	CriticalHit = tool.CriticalHit
}

tool.Activated:Connect(function()
	if not Debounce then
		Debounce = true
		CanDamage = true
		Sounds.Woosh:Play()
		local Humanoid = tool.Parent.Humanoid
		
		local SlashAnimation = Humanoid:FindFirstChild("Animator"):LoadAnimation(Slash)
		SlashAnimation:Play()
		task.wait(2)
		Debounce = false
		CanDamage = false
	end
end)

tool.Handle.Touched:Connect(function(hit)
	local humanoid = hit.Parent:WaitForChild("Humanoid")
	if humanoid and CanDamage == true then
		local CriticalHitChance = math.random(1,20)
		
		if CriticalHitChance == 20 then
			CanDamage = false
			Sounds.CriticalHit:Play()
			humanoid:TakeDamage(30)
			humanoid.WalkSpeed = 0
			humanoid.JumpPower = 0
			task.wait(5)
			humanoid.WalkSpeed = 16
			humanoid.JumpPower = 50
		end
		if CriticalHitChance <= 20 then
			CanDamage = false
			Sounds.Damage:Play()
			humanoid:TakeDamage(10)
			humanoid.WalkSpeed = 0
			humanoid.JumpPower = 0
			task.wait(3)
			humanoid.WalkSpeed = 16
			humanoid.JumpPower = 50
		end
	end
end)