I am trying to add a stun to the enemy NPC and the localscript does not run at all. Why?

Here is the LocalScript within the Orc enemy. It is meant to make it so the enemy gets stunned when they're hit. I commented out the wait() until since I thought that was what was causing the problem. But even the print statements won't run. Is this simply not possible for NPCs?

    Humanoid = script.Parent:WaitForChild("Enemy")

-- stun animation

local Stun = Instance.new("Animation")

Stun.AnimationId= "rbxassetid://02986478822"



local canAttack = script.Parent.CanAttack



--repeat wait() until Humanoid:IsDescendantOf(game.workspace:FindFirstChild("Enemies"))

print("Made it here")

print("Made it here")

print("Made it here")



local AnimationTrack = Humanoid:LoadAnimation(Stun)

AnimationTrack.Priority = Enum.AnimationPriority.Action



local LastKnownHealth

game:GetService('RunService').RenderStepped:Connect(function()

print("RENDERSTEPPED ORC")

if LastKnownHealth then

if LastKnownHealth > Humanoid.Health then

print('Playing')

canAttack.Value = false

AnimationTrack:Play()

end

end

LastKnownHealth = Humanoid.Health

end)