Tried it first time the colonists were invisible (couldn't go any further due to server maintenance). Second time, the colonists were there but now the nodes aren't clickable. I just get the crosshairs on them.
Tried this mission a month ago...no luck. Tried it today, still bugged. Invisible colonists, nothing to click on that works. Nothing to tag. Pretty ridiculous they haven't fixed this bug after 4+ months.
Just tried this mission myself. as with all the others the colonists are invisible. But in addition I can not kill the drones. They just stand there stunned for about 30 seconds and then they reactivate with full health and shields. Even an exploit when they have almost no health left only leaves them stunned. The only ones that die are the Proto Drones, and at one point I was fighting almost 20 of them, while trying to find the active points.