@TeamYouTube Why can't I change my Channel Art. (Every single time I try it asks me to sign in or something)pic.twitter.com/HyxOVIMHWc
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
Just to confirm, have you noticed the same error while uploading the channel art from other devices/browsers? Keep us posted.
I haven't Tried Yet But I will
I tried it on Google Chrome and it worked. It didn't work on Firefox though.
Glad to know that it worked. Could you try clearing the cache and cookies on Firefox browser to see if that does the trick for you? Let us know.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.