Can't build weapons terminal but have the mats.

[Maximus Killius]

I started the Expanding Your Base mission on my freighter. The first one to build was the Construction Terminal. Built that, went and found a construction guy. No problem. Next, was to build the Science Terminal. Built that, went and go a science guy. No problem. Next was to build a weapons terminal. But here's what's weird. I hit Z, clicked on the Weapons Terminal, It has green check marks on the 3 materials I needed, but when I tried to place it, red room only. Wouldn't turn green no matter where I tried. Then I noticed at the bottom of the Weapons Terminal Room recipe, below the materials needed with green check marks, it says "Available to build: 0. Why 0? I have the mats. I went down to a base I had on planet and was able to build a weapons terminal there. Deleted that one, went back to my freighter, went to a different system, tried to build again, but same thing. Available to build: 0.
Anybody else had this kind of problem?
Any help will be much appreciated!

[smurfy]

Some freighters come pre-built with a Weapons or Exocraft terminal. Maybe you already have one?

[SirProsik]

On the freighter it is a specialized blueprint purchased at the freighter upgrade terminal.

[Captain.Jartyk]

Originally posted by Maximus Killius:

I started the Expanding Your Base mission on my freighter.
.
I hit Z, clicked on the Weapons Terminal, It has green check marks on the 3 materials I needed, but when I tried to place it, red room only.
Wouldn't turn green no matter where I tried. Then I noticed at the bottom of the Weapons Terminal Room recipe, below the materials needed with green check marks, it says "Available to build: 0. Why 0?
.

Some freighters have one of the terminals already built into it's original base (science, weapons, exo-tech), but you can only have one of each in a base, so your weapons terminal is probably already there, try hiring a weapons guy, and see where he ends up.

Originally posted by SirProsik:

On the freighter it is a specialized blueprint purchased at the freighter upgrade terminal.

The blueprints for the terminals cannot be bought, nor are they in the freighter terminal, you get them all from the overseer, and the same blueprint applies to both ground base and freighter, but what you build is different, a small terminal on the ground base, a large room on the freighter.