Comment 4 for bug 1817490

No, it should be fine, a new version of the indicator migrated out of disco-proposed before the new gnome-shell version was ready, we deleted it now. You can either reinstall https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-appindicator/22-1/+build/14875546/+files/gnome-shell-extension-appindicator_22-1_all.deb to restore the functionality until the new gnome-shell stack become available for all users