The front of the dispenser comes off my prying out on the bottom of the panel. Look up at the bottom for two slits one on either side. Put a flat blade screwdriver in the slot and gently pry out while pushing down until it comes loose. The end of the water line may have split or simply fell out of the bracket. You may be able to put it back in the mount, or if it needs to be replaced, this fitting kit (AP3179954) will do the trick.