Had this issue before the update. I'm not able to connect to coop play. Get this error code every time (Bookworm-9770CCC2). Reinstalled the game 3 times, reset mac address, reset router and xbox and nothing. After the update (4/9/18) I was able to join coop and everything worked fine. Now today (4/10/18) I'm getting the error again. I've reset my console, mac address, and I'm currently reinstalling the game. Is there anything else I can do? I really enjoy the game and it would be a shame to miss out on coop.
Hi feralbeast666! These steps may help with this issue. If they do not, please create a ticket with a screenshot of your forwarded ports.