Some quests were broken in early builds of beta 0.71. So if you are using such a build, then the problem may be in this. But more often the reason arises from the fact that the player does not complete some story or personal quests of other characters. So talk about this with the bartender and fortune teller.
In this situation, the level of relationship with Nel is very important. Start checking with her.
I usually follow simple logic: first I look for new story quests (if I don't have enough logic, I go talk to the bartender, but this point should obviously be the second :-) ), then I try to help Celica become a better mage (search for new ingredients, improve items in the inventory, use items and skills in battles, increase levels for Candy, Faylen to green levels), best friend (for this we ask Nel to use the body, inviting friends, at the same time we pump up Celica's level and friendship). Well, and then you can ask the fortune teller how to improve the relationship. Usually you need to complete some quests or buy an artifact from L.
In general, it is difficult to get stuck in this game, especially when compared to other jRPGs.
