That's odd. Clearing your browser's cache and cookies clears things up on desktop. Also, have you tried using another device/browser to see if it's otherwise? You may also refer to this article for more help: https://goo.gl/EoqZ9c . Keep us posted.
We'd like to know more. What happens when you try adding end screen? Do you see an error message? Share screenshots and we'll look into it further. Keep us posted.
-
-
This Tweet is unavailable.
-
- 4 more replies
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.