Can't send or receive messages to a friend on MSN

We’ve both updated Reviver to the latest version. We can both sign in but whenever we send each other messages get a notification saying that our messages weren’t sent. It was working perfectly fine before the latest Windows 10 update. Is there anything we can do to fix this?

each one will delete their contact from wlm and,wait 24 hours and then,add each other with butterfly messenger.