Cant find The TerraGroup Trail quest

It should be added in 3.6.1?

The Terragroup Trial quests have been added with 3.6.0, but hidden under seasonal events.

Although (like Monvic said), they should be visible in 3.6.1, you can check in Aki_Data\Server\configs\quests.json, row #17 (?) called "showNonSeasonalEventQuests": false and set it to "showNonSeasonalEventQuests": true (I use Notepad++ to edit the files)

The issue I encountered is that I received all quests at the same time rather than the next in line after I completed the previous.

On a side note, also expect the quests to be a bit more tough (or some too easy) to complete, since it's not LIVE EFT.

Good luck!