Something strange about tutorial 2

[cubanresourceful]

I recently got back into the game after a hiatus due to my engineering classes getting a bit more...difficult haha. Now that I've returned I decided it would probably do me well to relearn the basics, but as I was doing tutorial 2, I am stuck at the part when you're supposed to build an Harvester Exo-field. Thing is, it's says its locked and I am unable to unlock it, even though the tutorial is telling me to "buy" the technology with my Knowledge. So, am I missing something inconceivably simple?

If it helps, I am running the latest beta, I think 4.032 or something along those lines.

Thanks my fellow Generals,

Mario

[Lancefighter]

silly question.. what are you trying to 'buy' it from? only science labs allow you to unlock things, you cant unlock it from the build menus

[cubanresourceful]

I knew it was something as simple as that. Maybe it IS good I am relearning everything, seeing how I HAVE forgotten quite a bit. :O