JavaScript boy and “lovely thoughtleader” 
he/him 
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
This is the first time in my life that I see this error. Any steps to reproduce?
No idea. It was to do with websockets is all I can remember. I was moving a lot of code around.
Firefox probably got pissed of all that movement then 
There is literally only one occurrence of InvalidStateError in the context of WebSockets 
https://html.spec.whatwg.org/multipage/web-sockets.html#dom-websocket-send …
Then I must have encountered that then?
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.
