Copying Weapons to a Players backpack Gets a random error?

local store = game.ServerStorage

game.Players.PlayerAdded:connect(function(player)
	if player.Name == "xlaser23" then
		player.CharacterAdded:connect(function(char)
			local s = store.NuclearBomb:Clone()
			s.Parent = player.Backpack
		end)
	end
end)

Its suppose to be Clone

But the OutPut says

21:45:18.557 - Workspace cannot be cloned