I’m also getting this message, have been for the past couple months. Usually the box just pops up and I can’t talk to anyone/the game lags out and occasionally I get booted back to log-in, but after a few minutes it reconnects.
Sometimes my screen also randomly goes black (can still see cursor and hear GW music) either after the pop-up or just on it’s own. I can’t see the game at all and have to alt tab out, where I can see everything else I have open just fine, and then right click the GW icon to exit out and restart. I really don’t think these problems are on my end, this is the only game it happens with and I’ve tried uninstalling/reinstalling and changing my firewall settings/disabling them completely.
Really upsetting as the game has been virtually unplayable for me the past couple months and it’s been getting more and more frequent. :\