Why Doesn't my left arm make an animation once I activated the tool ?

I made an animation where all my body parts move , but when I activated the tool that will trigger the animation , everything moves except my left arm.

Script type :Local script Location : tool

script.Parent.Equipped:Connect(function(Mouse)
Mouse.Button1Down:Connect(function()
	local animation = 	game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(script.Parent.Animation)
	animation:play()

	end)
end)

Animation : rbxassetid://4872373299 animation location : tool

Is there any way I can fix it ?

Make sure that the animation priority is action, and that you do move the left are in the animation somewhere (if you haven't already).

There may also be another animation overwriting the arm one, so check what one's are playing

Your animation core has to be of action or else it wont work The way to change this is by when u make a animation using animation editer press the ... and look for Priority and change that to action if u do that then it will work