I'm curious about something, guys. I've been messaging this person I know using Facebook messenger (via the web browser.) I haven't used it for a couple of weeks, so today when I clicked on the message icon (on top) I go this shown at the bottom where I'd usually type it in: and then when I tried to load their page via a direct URL, it gave me this: But then if I load this page at a different computer (say at work) their page loads just fine. I don't use Facebook that much. So what does all this mean?
It probably means he's lost his account or he's blocked you. Give him a call and see if he knows what it might be from his perspective.