This seems like a net positive.https://twitter.com/reuterstech/status/958810345010810880 …
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
I, too, hope it is not the reason. But I have no intention of looking into it.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.