If you first bring over the naval mines to marcus first, then activate turrets and lastly NAGA protector, interaction with Marcus is bugged and the quest cannot be completed despite him giving you cash for all of these.
If player talks to marcus only after activating both turrets and naga or activate the turrets lastly, the quest works normally.
Save link:
https://drive.google.com/drive/folders/1Iz6OspUbQOUdt38zpatGFgJsSri3EzTK?usp=sharing
