Once I updated the game to its current version, I could not purchase the batch of 10 rations (purchase button greyed out) and when I'm managing my home, even when auto-buy rations is on, my rations drop down to zero really quickly with the slaves that I have. 

Any solutions?

I experienced that if I "stay up all night" and not end day, it can get confused about times and stuff - maybe that happened?

I've been keeping a fixed sleeping schedule since early game cause I get tired after a whole night anyways.