I hear a lot about mealworm causing impaction, like everybody... then everybody keep saying they hear a lot about impaction but I'd like to ask this... can anyone here tell me of only one actually legit story of an amphibian getting impaction from eating something they're made for?
Amphibs digest chitin into protein if I remember well...... so this whole impaction thing are lies. If you frog has digestive issues, your temperature and humidity are prolly off.

Mealworms aren't good staple for nutrional value reasons. They're very good backup plan tho as they're cheap, easy to find and can be stored for a long time!
Ultimately, you really want a friend to ship you about 200-300 dubias roaches or any other kind and you start your own colony. Doesn't take much space or time to take care of and they're from far the best staple feeder out there for amphibians. They come in all sizes, don't stink, don't cry, don't bite, don't climb.. don't DIE!
Earthworms are pretty good too but not the greatest staple, they lack a bit of P. Easier to add Ca than P
Diversity is the key to a healthy frog tho.
Here's what I feed mine; roaches, flies, crickets, horn butter silk wax earth WORMS, beetles, weevils, springtails and isos, and I am hoping to start culturing aphids too.

Telling us what kind of frog you have would help too!