I updated the GNOME Shell by these points:
- sudo add-apt-repository ppa:ricotz/testing
- sudo add-apt-repository ppa:gnome3-team/gnome3
- sudo apt-get update && sudo apt-get dist-upgrade
- sudo apt-get install gnome-shell
Unfortunately, no longer work themes and extensions.
How can I fix it (or return to the previous version)?
Regards and I hope to help.
Edit:
I noticed that I can not update gnome-shell-extension-common