Problem with installing weapons DarkRP

I tried to install a weapon pack on my server. I have put the whole pack folder in addons and put the weapon folders that are like weapon_blabla in the weapons folder of DarkRPmodification folder. But when I shoot the weapons I don’t hear any sound, and they create a script error in console:

[ERROR] addons/darkrpmodification-master/lua/weapons/bobs_gun_base/shared.lua:249: attempt to index a nil value
1. CheckWeaponsAndAmmo - addons/darkrpmodification-master/lua/weapons/bobs_gun_base/shared.lua:249
2. unknown - addons/darkrpmodification-master/lua/weapons/bobs_gun_base/shared.lua:232

So can you help me?

are you using m9k weapons?

What is the folder structure like of the original weapons pack? Like when you open it does it have a lua, materials,models,and sound folder inside?