Plenty of posts on this stuff guys... it has to do with your personal maps still being setup under 1.13. The patch doesn't know how to update your personal maps for some reason.
You'll need to find your Galaxy Folder [ > users > user_name > appdata > local > Ironclad Games > SoSE > Galaxy ] and delete / move all your maps. If you made the map in GalaxyForge, hopefully a new version will be out soon and you'll be able to update it from 1.13 to 1.14. As far as in-game designed maps, I don't know.