Hi and welcome to the forum.

it does look like MBD, the only way to confirm it is to do xrays and see the density of the bones. Based or your history the MBD is more then likely the case.

It can be reversed to the extend, but deformity of the bones it's not possible to fix. It's albino, so no UVB can be used.

How big is a frog, how old?

you need to follow supplementation schedule exactly, get a proper supplements too.
- reptile and amphibian multivitamins ( use them once a week)
- ca with vit d3 - use it 2 times a week.

get any brand, exoterra are good too, when dusting food, make sure you shake off all excess dust, frogs don't like when the food has dust all over. Personally I like repashy the most, it is a very fine dust and covers food very nicely.

at this point I suggest you get resque Ca I believe by exo terra and reptiaid (reptiboost) by Fluckers, use both according to the instructions on a bottles. Make sure you are gut loading your crickets too. You can use reptiaid for dusting crikets for the nearest month instead of multivitamins. ResqueCa instead if ca/vitd3.

NEVER use human supplements!