I'm not actually sure if this has anything to do with the new update, or if it's just something I haven't run into before, because I haven't used Conqueror with pre-built settlements a lot. I happened to have a playthrough where I was just about to start taking over settlements, so after the latest update I went to that and took over Taffington. Once I took it over, and everything seemed to work perfectly, and Jammer told me to build the new desk, etc., I wanted to change some of the plots. The external plots I can access fine and change them to different plots, but the internal plots give me nothing. They act as though there is nothing there and don't give any option to select the menu.