There's no more candy in the bag right now. Looks like there's a refractory period of some sort.
Notes
Each use yields 5–6 pieces of candy. (It is possible to receive six of one type of candy.)
Owning more than one still limits you to one use a day.
References
A "refractory period" is the amount of time that an organ or cell must rest before performing an action again. This is commonly used to describe the amount of time between orgasms and/or sexual excitement.