https://arstechnica.com/gadgets/2020/05/a-mistake-at-facebook-broke-spotify-venmo-tiktok-and-other-iphone-apps/

Users of numerous popular iPhone apps such as Spotify, Venmo, Tinder, TikTok, DoorDash, and Pinterest experienced persistent app crashes as a result of a bug in Facebook's SDK this week. The crash reports began coming in around 6:30pm Eastern yesterday, but the issue has since been resolved.

Not long after the problem emerged, it was revealed to have been caused by a server-side change by Facebook. "A new release of Facebook included a change that triggered crashes for some users in some apps using the Facebook iOS SDK. We identified the issue quickly and resolved it. We apologize for any inconvenience," a Facebook spokesperson told The Verge.