https://www.gamespot.com/articles/fortnite-high-stakes-update-week-9-challenges-dela/1100-6461551/

Fortnite's recently teased High Stakes event is coming a little later than planned. Developer Epic Games announced on Twitter that the event--along with the 5.40 update--will now roll out for PC, PS4, Xbox One, Nintendo Switch, and mobile on Thursday, September 6, which will also delay the arrival of Week 9's challenges.

According to the studio, the event and new patch have been pushed back "due to the discovery of a critical controller issue." Epic didn't divulge any further details about the issue, but as a result of its discovery, this week's new set of challenges will also arrive a little later than normal; they're now slated to go live on Friday, September 7, as opposed to their usual Thursday rollout.