Thanks for sending a screenshot of the error. These kind of errors can usually be fixed with some trouble shooting – can you try to clear cache and cookies, then relog in to your account. Let us know how that goes.
@TeamYouTube 3 videos in my playlist and I can't set them as official series. None of these videos are uploaded to a separate or different channel.pic.twitter.com/GeXX4Uy8jA
-
-
-
Cleared cache and deleted all local storage from http://youtube.com in Chrome. Same errorpic.twitter.com/8BiZZzS1uX
- 2 more replies
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.