The API third party clients use to connect was disconnected. The app literally cannot connect to Twitter anymore. There is nothing they can do, other than writing a web scraper, which isn't worth it.

I don't agree with the unannounced disconnection of the API, as there was room for compromise, such as third party clients only available to people who pay the subscription to Twitter, but alas, the new corporate direction is that they want the ads to go through, and that wasn't happening at all with the third party clients.