When did she used to nurse, at what point in your schedule?
Any change in schedule will take at least a week, but probably longer, for you to "retrain" her brain. Also, around 8 months, a lot of babies think they are so independent and want solids (especially finger foods) over milk. We just have to patiently keep offering. When a baby weans from the breast, it is more gradual, one nursing at a time, not sudden refusal.
I find that our nursing after naps go best if I immediately sit down to nurse before we even leave his room. I don't really talk to him before nursing, just pop him on. If we leave the room, or talk, he won't nurse. HTH