Did you clear the command center too? It's the building you couldn't enter before the hacking. After the hack, you can enter the command center from the first floor. Clear out first and the second floor, then activate the switch.
Even if the marker on the map doesn't show you can do the mission again. You'll notice that the door to the flophouse area won't open. Just go around the mountain and approach from the other side.
After that, you'll be able to put up the settlement.
Hope it helps!
I am having the same exact problem as well with the Flophouse quest. Because of this I cannot establish the colony, which means I can't complete many of my outstanding quests. I have tried all of the solutions to this bug that others have tried, and none of them work.
This is on a PS4 Pro, with version 1.04.
Same issue. Stuck waiting for security scan. Spent hours trying to figure out what I missed.... So frustrating, EA no help?
OK so I finally was able to finish the quest. Here are the steps I took, hope this helps others.
I left the planet, and came back. Went to the flophouse and started engaging all the scavengers. Worked my way all the way to the top to the far east building (You can turn off the alarms if you want). There is no marker for this on your map, once you approach the correct building SAM will talk about hacking the security. Inside the building there are 2 terminals, one of them you "hack" which starts a wave of enemies. Once complete the bottom building is unlocked and you can proceed with finishing the quest. As soon as the quest completed I got an updated quest to build the outpost. I believe the bug is that you can complete the Remnant core quest before engaging this side of the flophouse, which is what I did. That door should be locked until this is completed to prevent this from happening.
I followed this to make sure I was not missing anything. Hopefully this helps other out with this bug.
http://masseffectandromeda.wiki.fextralife.com/The+Flophouse
Very frustration EA, I spent 4 hours trying to figure this out with 100% viability on Elaaden. Please fix this quest.
The problem is it won't let me into the command center. I just keep getting stuck in a loop of turning of the alarm and holding my ground.
year 2021, ps4, same issue... anybody have a real solution?
