AnimationController not playing slash animation for my tool?

As the name says, the tool that uses AnimationController doesn't play the slash animation

script:

local Tool = script.Parent
local AnimationController = Tool.AnimationController
local Animator = AnimationController.Animator
local Animation = Animator.SlashAnim
local AnimationTrack

Tool.Activated:Connect(function()
    AnimationTrack = AnimationController.Animator:LoadAnimation(Animation)
    AnimationTrack:Play()
end)