I have several production lines that have two buildings each. In a few of them the first building is working, but the second is not. I have all the necessary raw materials and population. In fact the most basic instance of this is that I have two rigs, which up till now were each producing water.
Now all of a sudden only one is working and I still have a queue full of water production orders.
Edit: Nevermind, I figured out I didn’t have enough money for the production fees.