https://arstechnica.com/tech-policy/2023/03/after-musks-mass-layoffs-one-engineers-mistake-broke-the-twitter-api/

When Elon Musk blamed Twitter's outage yesterday on code that "is extremely brittle for no good reason," he ignored the effect his massive layoffs had on Twitter's ability to keep the site running.

Twitter said the outage, which broke links and other functionality for about an hour, was caused by "an internal change that had some unintended consequences." That change, according to a Platformer article, "was part of a project to shut down free access to the Twitter API."