problem was in folder name
is was "asseSts"
it must be "assets"
So, I made textures, but in game they doesn't have any textures and called "andremod.example_item", log is:
Unable to load model: 'andremod:example_item#inventory' referenced from: andremod:example_item#inventory: java.io.FileNotFoundException: andremod:models/item/example_item.json
but this place: andremod:models/item/example_item.json is exist and actually have this file example_item
what can be wrong?