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

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)