I got stuck there for a while too. As well as talking to the merchant at the table on the right, who says you need to come back in the evening, you also need to talk to the knight who is usually in the area to the right as you come in, who says he can't be bribed. You may need to talk to him more than once, but eventually you'll be given the chance to bribe him.I'm stuck here i already interacted with all of the npcs did i manage to skip an important message?