Why doesn't my sword animation work when anybody but me uses the sword?

For some reason, my sword animation that I made only works on me. When I ask a friend to test it on their character, it doesn't function and in the output it says cannot load animation.

I used a local script for the animation and I put an animation item in the local script. The local script is:

local CanAttack = true

script.Parent.Activated:connect(function()
    local attack = script.Parent.Parent.Humanoid:LoadAnimation(script.Attack)

    if CanAttack == true then
        attack:Play()
        CanAttack = false
        wait(3)
        attack:Stop()
        CanAttack = true
        script.Parent.CanDamage.Value = true
    end
end)

(There is also a boolvalue in the sword tool set to true)

So could someone give me a solution, that would be much appreciated.