https://www.cnet.com/news/fortnite-gets-a-new-playground-mode-in-latest-update-but-its-down/

Fortnite: Battle Royale's latest update, version 4.5, on Wednesday unveiled a new mode called Playground, new dual pistols and other significant changes to the hugely popular online shooter. 

But once the update dropped, Fortnite's multiplayer matchmaking began to break, forcing the company to roll the update back while it worked out the bugs, GameSpot reports. The game itself is still working smoothly while the errors are being fixed, but you'll have to wait for these new features.