Is there a way to fix this error about an object not being a descendant of the game?

I'm having this error where Humanoid is not the descendant of the game when trying to load an animation.

Here is the script; [NOTE]: It's in a LocalScript and not Filtering Enabled.

local player = game.Players.LocalPlayer
local char = player.Character or player.CharacterAdded:wait()
local mouse = player:GetMouse()
local hum = char:WaitForChild("Humanoid")

local data = player:WaitForChild("Data")
local strength = data:WaitForChild("Strength")
local levelxp = data:WaitForChild("LevelXP")
local strengthxp = data:WaitForChild("StrengthXP")

local can = true
local animation = script:WaitForChild("PunchAnimation")
local anime = hum:LoadAnimation(animation)

mouse.KeyDown:Connect(function(pressed)
    local key = pressed:lower()
    if key == "f" and can and anime and char:FindFirstChildOfClass("Tool") == nil then
        for i,child in pairs(char:GetChildren()) do
            if child:IsA("Tool") then return end
        end
        can = false
        levelxp.Value = levelxp.Value + 1
        strengthxp.Value = strengthxp.Value + 2
        anime:Play()
        local s = script:WaitForChild("DamageScript"):Clone()
        s.Parent = char:WaitForChild("Right Arm")
        s.Disabled = false
        local creator = Instance.new("ObjectValue")
        creator.Name = "Creator"
        creator.Value = char
        creator.Parent = s
        local damage = Instance.new("IntValue")
        damage.Name = "Damage"
        damage.Value = (((strength.Value^2)/100)*20)
        damage.Parent = s
        anime:Play()
        anime.Stopped:wait()
        anime:Stop()
        s:Destroy()
        can = true
    end
end)