The link doesn't work at all. First thing I would do though, is put it in a hospital tank. You just need a critter keeper with some damp paper towel for substrate, and a water dish, and a fake plant or something of the sort for the frog to hide. Keep it in a dark, stress free room and keep an eye on it.

Have you been dusting the crickets with a vitamin and calcium supplement? Have you been watching how much they are each eating? What have you been feeding them?

Here is a link you should take a read through - The Frog Doctor