Sort of the same issue. I set up having Preston be the lead and after the cut scene noticed the quest wouldn't clear. Tried a few things before coming here. Did a reload from a bit earlier and tried setting up the beacon before assigning Preston the job and it still didn't clear, tried leaving, sleeping and quitting to restart the computer. I have 2 people who have come because of the beacon but no option to let Preston know. I'm going to stop here and play another character until I hear something.
I have used this with 4 settlements, (Sanctuary, Red Rocket, Tenpines Bluff and Sunshine Tidings co-op which is my first problem.
I have a couple of slight issues going on in Sanctuary and Red Rocket, but they have to do with what I've done to the settlement, nothing with this mod. This mod is, as usual, amazing. Thank you very much.
Are you dealing specifically with the Taking Point quest? If not we need more info (and should probably set up another thread).
If so, the latest beta patch 3.0.2b has a fix for Taking Point in it. Are you running that currently or are you on the latest release