@LaBlue0314: Hm. Maybe this is a new issue with invisible Sims although I've seen the sims in the ground before. All I have is using DebugEnabler, Option Fix invisible Sims. You might get them back
@chevronfox: Would you be willing to plop in ErrorTrap to see if you get any scriptErrors with those ? I'll add them though
@Daijahv: This is usually caused by an outdated noMemory mod. Did you delete the cache files ?
@Silverwerehog: I'll add the invisible Sims issue
@BernardD: Family tree: Not that I know of. Spirits: I'll add
@TaigaWolf: Did you delete the cache files after deleting the mods ?
@ltd2mp87: Do you have any mods in your game ?
@Nirar22: Thanks for the report.