Could be a few things...
First, feed her once per day or every other day and keep feedings during the first half of the day. She needs time to bask after feeding to aide her digestion. Feeding at 9pm don't give her much time to digest which could lead to issues such as impaction which would cause her to stop eating.
Second, get a laying bin in the cage ASAP. She is old enough to lay eggs and if she doesn't have a place to dig a hole she can become eggbound which is lethal. When females get close to laying, they will sometimes stop eating and become restless.
Third, change up the feeders. Chams can get bored of the same bugs every day. Add more leafy greens to the gutload as well. Fruits are full of sugar which isn't always the healthiest. Use the resource page for gutloading info