@TeamYouTube This keeps happening to my YouTube App on my iPhone.pic.twitter.com/hcLNQWhVXh
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
That's definitely strange. Try uninstalling and reinstalling the app after restarting the device and see if that makes a difference. Let us know if this helps!
You can fix it by restarting the app most of the time.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.