@TeamYouTube @YTCreators it won’t let me upload this as my YT bannerpic.twitter.com/RaGPkJ9qJH
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 does seem odd! Wonder if it's a browser issue, could you try clearing cache/cookies and disabling any add-ons or extensions? Also, could try reinstalling the app. Keep us posted.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.