That's not a bug, it's just confusing design.
To be able to configure the shell theme you first need to:
sudo apt install gnome-shell-extensions
** Changed in: gnome-shell (Ubuntu)
Status: New => Invalid
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1845967
Title:
gnome-shell missing Theme (warning icon)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1845967/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs