I'm assuming this is an RE thing, not vanilla, but I could be wrong. But if I'm not....

I've never encountered one of these before, but I found one on a temperate moon in the system I'm currently exploring, and I thought I'd do whatever needs to be done with it.

I fed the materials for the initial "round" of building into the designated box and it worked fine. Then I fed the items for the next "round" into the box, and it worked...except for the "Power Supply" category, which requires a medium fuel tank, a basic generator, 50 energy regulators, 250 electronics, and 50 double fuel cells. I put all of those items in the box in the exact amounts called for, but the console said that there were insufficient quantities. But there aren't. The only things in the box are the exact items in the exact quantities listed. I even went so far as to re-construct all of the items fresh. I thought maybe something got messed up because the generator and the other components besides the fuel tank were all items I had on-hand in my carrier, so I just plunked them in the box. Still no go with freshly-constructed items. I exited the game and reloaded it. Still nope.

So now I'm wondering if maybe the text that tells you what you need is wrong and something else is needed instead of or in addition to the listed items. Or maybe different quantities than what is shown are needed. Or...something. Whatever the case, I can't progress, which is a shame because I'm curious about what this thing is or does when it's built. So if anyone has any insight, I'd appreciate it.