Age of Strategy Forums

The tutorial asks you to research early plasma tech in the TC, however only advanced plasma tech is listed and needs early plasma tech (which is unlisted) to research before it can be unlocked. The description in the units section for technologies shows early plasma tech should be researchable in TC. Is this an error that it is not listed in buildable tech options, or am I missing something? Thank you to whoever can give me some help with this

Early plasma tech is an upgrade you need to buy for gems

Btw, I know it says you need to research the techs, but you just need to eliminate all enemies to proceed.