[ARCHIVED] Orange/Green Exclamation signs over lots / Houses disappear

so i'm playing on ts4 with a save that that i have been using for a few months now, and i noticed that a lot of households and lots from various towns have exclamation marks that vary in color above them. i clicked on on household to play them and see what was wrong, and the entire house is gone. i have a screenshot of the current household with the entire house missing after inspection. and i know they had a house when i first started playing the save, because my sim has visited them plenty of times. this is happening with the other affected households and lots. i tried repairing all my packs on origin, but it did nothing. i have no mods. another thing that's been happening is that when i move my sims, and try to keep their furniture, it all disappears. i cant locate the items in the inventory, nor are they back at the previous home they lived in. this hasn't happened before. what do i do