Hi,
I have the same error.
Failed to load mods: Additional-Turret-revived/prototypes/ammo-item.lua:500: attempt to index global 'item_sounds' (a nil value)
stack traceback:
Additional-Turret-revived/prototypes/ammo-item.lua:500: in main chunk
[C]: in function 'require'
Additional-Turret-revived/data.lua:14: in main chunk