Hello there!
While flying the jetpack, you should see adds, just kill all of them. (afaik some reset if you're getting out of range, focus them down one after one with your teammates)
To the right and left of the door are platforms glowing red. If you stand on them you'll get the ability to press four different colors (standard shortcuts zxcv).
Also, an order of colors (in increasing number if i remember correctly) appears on the screen. Wait till its finished and then repeat it. (like
Simon)
You have to pass through three doors, so you have to do this game three times, sometimes more than once per door.
If you completed the puzzle the platform turns from red to green and stays like that as long as you stay on it.
Both platforms need to be green to open the gate. (you can get a temporary bubble from the npc you're walking with)
Good luck, come back when you've reached Locust
Kind regards
Vagrimst