When creating/assigning a menu link to a page in PageBuilder's front-end, the link doesn't work. I contacted the devs at sh404SEF and they said when the link is saved, PageBuilder isn't passing along the page ID# (see screenshot link below ... the first information passed to sh404SEF is the one that is selected by default ... it's missing the page ID, in this case #12).
sh404SEF screenshot: https://helixsh404.dryfivedev.com/images/sh404result.jpg