As it turned out, I overlooked the global toggle switch in the window title bar of the "Extensions" application.
** Attachment added: "Screenshot from 2021-10-25 23-00-38.png" https://bugs.launchpad.net/ubuntu/+source/ubuntu-gnome-meta/+bug/1948472/+attachment/5536540/+files/Screenshot%20from%202021-10-25%2023-00-38.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1948472 Title: Gnome-shell-extensions could not be activated after upgrading to impish To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-gnome-meta/+bug/1948472/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs