Brothers in Arms. Novigrad. Help Triss finish what she has to do. Bug?

Solution 1:

addfact(q302_whoreson_found) addfact(q302_post_mafia_completed) addfact(q302_fdb_spoke_with_radowid_chess_club) addfact(sq302_start) addfact(q302_completed) addfact(q303_completed) addfact(q303_triss_about_sq301) addfact(triss_dd_start) addfact(sq301_started)

This is a common issue when fast traveling out of D's place. These console commands never worked for me, and they are the only resource you'll have to get Triss to finish up this quest

I never got this issue solved, it's been a bug without a proper fix for years. There's no reliable way to start this part of the quest. The good news is, is that you can just keep going with the main quest and the game will just continue. This is an optional quest that only affects one thing