the apply button is grayed out
I have several openVPN connections that were created under KDE. I want to change the gateway address but, after the change, the Apply button is not active (grayed out). I've tried to create a new connection copying parameters from another working configuration, but after filling the fields in the several windows, the apply button is not active. In the attached image, I changed the gateway to abc.com (a fake address just to show), but the apply button is grayed out.
I am already set as Administrator at System/Users panel.