This is similar to what happened to me with the Altarians when trying to upgrade there mining stations to the next tier, i had researched the tech but was never able to upgrade the station past the first tier mining module, regardless of how many constructors i sent. i think iv seen elsewhere on the forums similar bugs.

I made a similar post and apparently the reason its not showing up is that its accidentally giving you the tech one tech early. since most people just upgrade as far as they can go when they build a base they have in fact already built it and thus why its confusing when you get the tech and you think its not there. Anyway, bottom line is its know and its on there list of things to fix.

Bug is still present in 1.02 opt-in

This annoyed me pretty much too, actualy so much that I fixed it for myself (based on informations from TheBloody-Nine - thank you for them).

Here is what needs to be done:

backup and open "StarbaseModuleDefs.xml" in some text editor (notepad is sufficient) Default location is:

"C:\Program Files (x86)\Steam\steamapps\common\Galactic Civilizations III\data\Game"

Find: "XenoCommerce" inside - there is only one in the whole file

the section will look like this:

<Prerequ>
      <Techs>
        <Option>XenoCommerce</Option>
        <Option>MarketingTech</Option>
      </Techs>
      <StarbaseModule>EconomicRingModule</StarbaseModule>
    </Prerequ>

now copy and delete <Option>MarketingTech</Option>

result:

<Prerequ>
      <Techs>
        <Option>XenoCommerce</Option>
      </Techs>
      <StarbaseModule>EconomicRingModule</StarbaseModule>
    </Prerequ>

still in the same file Find: "CulturalInfluence" again only one in the whole file

section should look like this:

<Prerequ>
      <Techs>
        <Option>CulturalInfluence</Option>
        <Option>ThePathTech</Option>
      </Techs>
      <UpgradesFrom>CulturalForumModule</UpgradesFrom>
    </Prerequ>

and add copied line from before so the result will be:

<Prerequ>
      <Techs>
        <Option>CulturalInfluence</Option>
        <Option>ThePathTech</Option>
        <Option>MarketingTech</Option>
      </Techs>
      <UpgradesFrom>CulturalForumModule</UpgradesFrom>
    </Prerequ>

save the file

Now you should have "Information Hub" starbase module under Marketing tech isntead of Starbase Market (which is still in Customer Relations, where it probably should be).

I apologize for any mistakes, English is not my native language.