I would isolate her to a crate with only water. Give her a stimulant free stool softener. Squeeze the contents of a capsule into some baby food with water so you can draw it into a syringe and give it to her orally. Then give her about 40-50 mls of water either tubed into the crop or carefully dribbled into her beak for her to swallow (without causing her to aspirate) followed by a crop massage. Give her another 40-50 mls of water every 2 hours along with another crop massage for the rest of the day.
At the end of the day, give her about 2 tsp of refrigerated coconut oil, more water and the final crop massage.
Check to see if the crop is empty by morning. If it is, keep her in the crate for the day but give her a wet mash made from her feed along with fresh water and give her all she wants to eat for the day. Remove it at night then check her crop in the morning to make sure it's empty. Then you can let her rejoin the flock.