You've met the messenger next to the Ribald's Mart on the Promenade, yes? And then you went to the docks, to the warehouse, and the guy wasn't there, do I understand correctly?
Okay, yeah, it's probably the Tactics mod, because it's a very old mod that overwrites everything, and it should be installed _before_ any newer mods, practically in the beginning(your Weidu.log in your game directory tells you which mods are installed and in what order). Back to Brynnlaw is compatible with it, and it doesn't overwrite files, but it should be installed afterwards.
You can continue playing, just do this: