Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
Most likely the author of the Building Plans has not added the most recent build of Hunter-Gather. As it is now we generally recommend people not to use Building Plans. This is because it's done by an outside source of SS, Thus meaning anytime the main SS mod or one of the add ons gets updated, the author of Building Plans must update his mod to ensure compatibility or else numerous issues will arise from the use of it.
Edit: After taking a look at the Nexus Page, it appears the author is aware of the issue. However he believes it is cause from the Creation Club update which has caused quite a few issues with mods since its release.