Open Discover -> Burger menu (top right) -> Configure Sources -> Configure Software Sources -> Updates tab -> Updates for proposed software.
I hope I got the translations right.
Then do: sudo apt update sudo apt install libkf5networkmanagerqt6 sudo systemctl restart NetworkManager
Now go ahead and test creating a new connection or editing a connection.
Open Discover -> Burger menu (top right) -> Configure Sources -> Configure Software Sources -> Updates tab -> Updates for proposed software.
I hope I got the translations right.
Then do: nagerqt6
sudo apt update
sudo apt install libkf5networkma
sudo systemctl restart NetworkManager
Now go ahead and test creating a new connection or editing a connection.