Might I suggest before building at Sanctuary (or any other place) and even after building a city plan there run Clean My Settlement.
Im not the only one having this issue from what I can tell so I beg and plead, make this playable for us in the next patch.pretty please with a cherry on top. I absolutely love this mod, but I am extremely tired of New Games, Searching forums for any fix under the sun. But not anymore, now the game crashes when I try to Fast Travel to Sanctuary.no problem, Ill just fast travel to Red Rocket and slow travel.wrong, game is now crashing when trying to fast travel to Red Rocket. My latest reboot of the game with SS2 has me just now getting to the Prydwen with only 21 settlers in Sanctuary but yet it crashes every time Im there for more than 60 seconds. But no matter what, at some point Sanctuary becomes absolutely unusable. Im not some huge modder, just a couple of cosmetic mod running. Every new game I start, Sanctuary Hills always crashes my game. I have tried over and over again to start a new game and mainly focused on the SS2 quests (Loving Every Minute of It). I see the blood sweat and tears that have gone into its development!! But for me, its broken. I really cant tell you how much fun this mod is to play.