This backweld script won't work!? Help!! it gives a error on bad cast?? [closed]

local cp = {"MaxRuthford","rosewood2234", "Player1"}

game.Players.PlayerAdded:connect(function(plr)
    repeat wait() until plr and plr.Character
    for i = 1, #cp do
        if plr.Name == cp[i] then
            local cloack = game.ReplicatedStorage.Cloack
            local cclone = cloack:Clone()
            cclone.Parent = plr.Character.HumanoidRootPart
            local weld = Instance.new("Weld")
            weld.Part0 = plr.Character.HumanoidRootPart
            weld.Part1 = cclone
            weld.C0 = CFrame.new(0,0,0.6)
            weld.C0 = weld.C0 * CFrame.fromEulerAnglesXYZ(math.rad(90),math.rad(30),0)
            weld.Parent = cclone

        end
    end
end)