Animation for Sword error. Can somebody explain me what's the Problem?

Hi there! I tried to make an animated tool with this LocalScript:

local player = game:GetService("Players").LocalPlayer
local animation = script.Parent:FindFirstChild("Animation")
local swingAnimation = player.character.Humanoid:LoadAnimation(animation)

local canSwing = true

local debounce = 1

script.Parent.Activated:Connect(function()
    if canSwing then
        canSwing = false
        swingAnimation:Play()
        wait(debounce)
        canSwing = true
    end
end)

Sadly it didn't work. I got this error: Players.Mimas18Hun.Backpack.Tool.LocalScript:3: attempt to index nil with 'Humanoid' - Client - LocalScript:3

Can somebody explain me, what's the problem?