Unable to cast value to Object?

I'm trying to make a script for when I hold the X key, the animation starts, and when I release, it stops. Well, everything was going well, until I tested it. I get the error, "Unable to cast value to Object" This happens on line 5 of my code. The code is below:

local player = game.Players.LocalPlayer
local human = player.Character:WaitForChild("Humanoid")	
local animation = Instance.new("Animation")
local ca = "rbxassetid://2401982156"
local canimation = human:LoadAnimation(ca)
game:GetService("UserInputService").InputBegan:Connect(function(input,gameprocesed)
 if input.KeyCode == Enum.KeyCode.X then
	canimation:Play()
 end
end)

game:GetService("UserInputService").InputEnded:Connect(function(input,gameprocesed)
 if input.KeyCode == Enum.KeyCode.X and canimation.IsPlaying then
	canimation:Stop()
 end
end)

Can someone please help me?

i just realised what you were doing wrong, its that you didnt set the parent of the Animation so it wont work, also i think your only suppose to use the ID of the animation if your not using the Instance Animation.

local player = game.Players.LocalPlayer
local human = player.Character:WaitForChild("Humanoid") 
local animation = Instance.new("Animation")
local ca = "2401982156"
local canimation = human:LoadAnimation(ca)

animation.Parent = workspace -- define where you want the animation to be a child of

game:GetService("UserInputService").InputBegan:Connect(function(input,gameprocesed)
 if input.KeyCode == Enum.KeyCode.X then
    canimation:Play()
 end
end)

game:GetService("UserInputService").InputEnded:Connect(function(input,gameprocesed)
 if input.KeyCode == Enum.KeyCode.X and canimation.IsPlaying then
    canimation:Stop()
 end
end)