I use workaround below for this issue. I installed network-manager- gnome, started nm-applet and hidden the plasma-nm icon in the system tray settings. It seems than nm-applet doesn't have the bug with editing of WIFI connection settings.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1569674 Title: [Kubuntu] Fail to connect to wifi after a recent update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1569674/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
