For around a week, the Twitter for Mac app has been crashing on launch making the app completely unusable. There was little anyone could do to make it work, deleting and reinstalling didn’t do anything. However, earlier this week Twitter has released an update for the app to stop it from crashing whenever it is opened.
Version 19.9.21 is now the latest and seems to solve the app crashing issue. However, the release notes do not say anything about this problem.
Twitter for Mac is free and available for macOS from the Mac App Store.