Update: Epic says that the login issues have been resolved, but the social issues remain. Fortnite: Battle Royale saw an extended downtime yesterday after unexpected problems occurred while the developer applied a patch to the game, but Epic was able to bring the game back up for the evening. Another tweet talks about problems with party and friends features:"We know players are still having issues seeing or partying with friends right now. It's unclear right now if the current outage is related to the patch, but it certainly seems possible that some unforeseen problems are cropping up again. Fortnite: Battle Royale is one of the most popular games in the world, racking up 45 million players across platforms.

Source: Forbes January 26, 2018 21:00 UTC