For those having problems with the stores not stocking stuff (items and slaves), just simply go home, and use the "rest ti'll morning" action.
We usually keep playing, and might just use "rest" whihc it's only 4 hours, like taking a good nap.
"rest until morning" counts as a full night sleep, even if it's only a couple hours or less. Note there's a faded black-out, which I assume it does a kind of game internal run check up.
This works with older saves, but don't be extreme.
An imported character from 5 updates ago will casues issues, since there are new mechanics and the new game wouldn't recognize old ones, or will look for things that weren't implemented yet.