I'm like 27h in without seta and TER has lots of ships.
But i noticed that my station in asteroid belt is mining lots of ore and almost no silicon and is starving on it for past 15h or so.
TER station now that i looked are very low on computronic substrate - guess they are starving on silicon too.
Maybe that's what's happening in your game, check if the shipyard have resources to build ships.