We'd like to provide an update about this issue. Unfortunately, we had to temporarily remove the option to link a Twitter or Dribbble account to your Upwork account because we need to work out interface issues with these two platforms. We are currently working to re-add these options as soon as possible, but it may take several weeks. Once we are able to re-add Twitter and Dribbble, you’ll see them once again listed as options under your Profile Settings.
Thanks for your understanding.