The carrot locator is part of a game here on HF. I don't think it's currently working.
But you can still collect them from the "Carrot Bandit" by dragging the carrots into your basket. You can also steal carrots from other members; it will give you an option to accept or decline the opportunity. And, finally, carrots can be stolen from you by the Carrot Bandit and "Tornado" xD It's fun (: