:Play() is not a valid member of animation?

I need help please. Why does it say Play is not a valid member of animation

local plr = game.Players.LocalPlayer
repeat wait()until plr.Character
local humanoid = plr.Character:WaitForChild("Humanoid")


local tool = script.Parent
local NilAnim = script.Nil
local FiringWeaponAnim = script.FiringWeapon
local EquippedWeaponAnim = script.EquippedWeapon

script.Parent.Equipped:Connect(function()
	humanoid:LoadAnimation(EquippedWeaponAnim)
	EquippedWeaponAnim:Play()
	script.Parent.Unequipped:Connect(function()
		print("Unequipped")
	end)
end)