Actually the workaround that works is a bit different in that you need to comment out the lines for extras.ubuntu.com in /etc/apt/sources.list as extras isn't in GUI any more. And then update packages. Also the bug is affecting getting new package lists from update manager as well.
Actually the workaround that works is a bit different in that you need to comment out the lines for extras.ubuntu.com in /etc/apt/ sources. list as extras isn't in GUI any more. And then update packages. Also the bug is affecting getting new package lists from update manager as well.