ENGINES WON'T START Your game took too long to build the ship and they didn't get their initial fuel. Find an info panel and combinator that details the fix just above and to the left of the middle engine. REACTOR KEEPS SAYING WAITING FOR FUEL Did you enable the request to send fuel up? Turn that on from the hub. FUEL LEVELS WON'T STAY IN SYNC Blueprint build order got out of whack and the fluid system is angry. Find an info panel on what to do above and to the right of the middle engine.