Look for missing stairs.
Move your Mods folder to the Desktop and delete localthumbcache.package. Then test the game in a new save.
If it works now check for updates to your Mods and CC. Add it back a little at a time while testing until you have found all that are broken.
This was while I had my mods disabled from within the game settings. Does that make a difference?
And they are able to go up the stairs to get to the house but not down the stairs from the house. So I added another staircase at the back of the house and they are able to get out just fine. They still use the front entry to go into the house, even NPCs and then they walk through the house to the back door to leave.
Honestly I think it's a terrain issue. But I downloaded the house from the gallery not knowing the terrain was made into a hill. That always messes up any Sim for me.
Thank you for responding!
