OK,so I just discovered that if I open gnome-shell-extension-prefs, there's a switch in the upper right corner of the window, which apparently disables all shell extensions, and I had that switched turned off, though I have no idea how or when I did that. Turned it on and now I can install extensions just fine.
** Changed in: gnome-shell (Ubuntu) Status: Triaged => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1851554 Title: can't install gnome shell extensions To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1851554/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs