Yesterday I upgraded ubuntu (xubuntu) from the old version 20.04 to 22.04. During installation a message said that all ppa were inactivated. After installation I would like to reactivate them. I get a time out, when I choose "other Programs" "add" and then type in the field a address like: "ppa:opencpn/opencpn".
What can I do to get the updates for opencpn or keepass or vivaldi for example?
Thanks Ronald