I had an issue where I couldn't talk to Bae Ling in Brigand's Row, and I didn't know how to fix it earlier. But it was simply that I had another questline, the Aransu Orange quest, that had Bae Ling in the first or second chapter, all I did was complete it. I'm not entirely sure why that quest affected whether or not I could progress, but if you had a similar issue that's something you can try.