https://www.gamespot.com/articles/fortnite-challenges-for-week-2-leaked-update/1100-6458764/

Fortnite's first set of challenges for Season 4 proved to be a bit more involved than usual, thanks to developer Epic Games introducing some new wrinkles. Week 2 challenges are also on the way, and thanks to the usual datamining process from Fortnite Tracker, we know what kind of objectives Battle Pass owners will be dealing with next. [Update: Week 2 challenges are live, and the leaked ones were indeed correct.]