It MIGHT pose a problem to the frog,
feeding insects with a hard outershell can sometimes cause a prolapse.
It can also clog the intestines, but i am not sure that is the case here.
Sometimes my offspring die because they had to much insects with indigestible parts.
Others seem to do just fine with it, so i give them those insects, but not to much,

Best is to vary in the feeder insects you use,
for bigger frogs you got a good amount of feeders you can use.

Silkworms, waxmoths(sparsly since full of fat), crickets, little grasshoppers, tebo worms, larvaes of the black soldier fly and the flies itself etc,
If you live in a place where you have woods or something where you are certain of they don't use pesticides or fertilizers you could just catch yourself some bugs to feed,
be carefull tough not to get yourself poisonous insects like bees, wasps, certain spiders and so on.

Reading you're first post,
i think you will do best with just increasing humidity,
however variation in food is always good ofcourse.
You wrote he did not eat for a month,
i think he is less active and you just did not see him feed.\
They do this at night and i realy think he would be dead by now if he did not eat that long.
Try getting him active by spraying when the lights go off or just before that.
You can do probably more wrong then good by stressing him out.

Just be patient and try getting up the humidity a little.
I hope you understand they are nocturnal.