On Rioja, I just spent a week ferrying a truck across water to start capturing new land. I built a land base and packed my truck up onto the ferry to go elsewhere. Then I built a few units, but despite having more than enough money to do so, the base wouldn't let me build a new truck, not even the option to do so. There is nothing blocking the base, and I had already built units, and had enough money, so the only things I could think of are some kind of built-in delay on building trucks or a game glitch or something. Any idea on what happened?