I'd love to be able to see the deets, but I guess I'm "not authorized to view these tweets"? Pretty sure I'm not banned or blocked, since I've never had an account. Do you have to log in now just to see anything on Twitter, or is that a user setting now?
ETA: Yup, they broke something. I can see it from desktop too, but on this iOS 9.3.5 device, every tweet from any user shows that message, and any other Twitter URI bounces me to mobile and then gives "Sorry, Twitter is taking too long to load" with a "try again" button that doesn't work.
Web 2.0 at its best. Thanks for all the helpful responses!