Just talked to Scharlatan in Sassau at the inn (after 22h ingame) to take his quest there. After exhausting all dialog optins, I missing the opportunity to end the dialogue. No matter what I do, I can not get out, KcD can not even finish with Esc
I had this same thing happen. I had to kill the game through task manager and reload. The next time I spoke to him using a different order and it worked.