Quest \ "Final preparations \" (The Witcher 3: Wild Hunt)

He got infected from Triss.

MaxEXpert
If I am not mistaken, wait until dawn and talk at dawn.

Brannan
Nifiga, I tried every hour of the day, stupidly one answer "yes"

who faced the same problem?
I completed all the other quests, this last one, but I have some kind of bug and I can't go through this quest any further