EG Inventory: Models weapons arent display in the inventory

Hello, I have actually a problem about the script EG inventory because when i pickup a weapon and i get in the bag(of EG inventory) it is inside but i dont see them , when i check my console i didnt see errors, im using actually the CW2 weapons and when i try with a weapon of darkrp its doing an error like this

Entities doesnt have any problems, its only weapons, the author is banned so i cant tell him, if somebody could help me please, Sorry for my bad english, Cordially.