I did not tick fog of war and add prisoners forever. I have cells, kitchen, office, canteen, yard. How do I add prisoners?
In the most recent version, you have to select if you want to receive new prisoners (option is called "open" and "closed" I think), also what kind of prisoners (min, normal, max security). by default, you will only receive normal security prisoners. But you will receive prisoners, even if there are no cells for them yet.
This setting has to be made in the prisoners tab in the journal (i think this was the correct tab.)