button1click is not a valid member of PlayerMouse?

Error occurs on the start of a test game.

Player = game.Players.LocalPlayer
Character = Player.Character
Humanoid = Character:WaitForChild("Humanoid")
Mouse = Player:GetMouse()
Anim = script.Swing
isswinging = false

Mouse.Button1Click:connect(function()
    if isswinging == false then
        isswinging = true
        local s = Humanoid:LoadAnimation(Anim)
        s:Play()
        wait(0.8)
        isswinging = false
    end
end)