I'm having this problem too. Took over the first area. Went to an adjoining one. Whole thing was completely dark, couldn't see anything unless i zoomed out to the world map view. Most places wouldn't let me go inside, kept trying, found one that did. Attacking that building lifted the fog for most of the area, but there's still random patches of it that prevent me from seeing anything, I can go through them, but I can't enter buildings in the fog, and if I get in a fight on the street it stays blacked out for the fight.
Restarting my console fixed it.