Failed to load mods: Mammoth-MK3/prototypes/item.lua:160: attempt to index global 'item_sounds' (a nil value)
stack traceback:
Mammoth-MK3/prototypes/item.lua:160: in main chunk
[C]: in function 'require'
Mammoth-MK3/data.lua:1: in main chunk

same goes for the SA-T1 mod

from another mod's page if it's any help:

Getting an error with 2.0.16

Failed to load mods: atomic-artillery-reborn/prototypes/item/ammo.lua:29: attempt to index global 'item_sounds' (a nil value)
stack traceback:
atomic-artillery-reborn/prototypes/item/ammo.lua:29: in main chunk
[C]: in function 'require'
atomic-artillery-reborn/data.lua:5: in main chunk

Mods to be disabled:
• atomic-artillery-reborn (1.0.1)

cart1443
9 days ago
(updated 9 days ago)
Figured it out.

Edit ammo.lua with 7zip in:

        C:\Users\[Username]\AppData\Roaming\Factorio\mods\atomic-artillery-reborn_1.0.1.zip\atomic-artillery-reborn_1.0.1\prototypes\item\ammo.lua

And update the sound code reference locations starting at line 29 to:

        inventory_move_sound = "__base__/sound/item/artillery-large-inventory-move.ogg",
        pick_sound = "__base__/sound/item/artillery-large-inventory-pickup.ogg",
        drop_sound = "__base__/sound/item/artillery-large-inventory-move.ogg",

Save, close notepad, save the changes to the archive in 7zi

Same issue

Same :(

sadly same

Confirmed, same issue.

from another mod's page if it's any help:
....

Just confirmed a similar fix works here. Go to ./prototypes/item.lua and change the lines at the bottom from this

inventory_move_sound = item_sounds.ammo_large_inventory_move,
pick_sound = item_sounds.ammo_large_inventory_pickup,
drop_sound = item_sounds.ammo_large_inventory_move,

to this

inventory_move_sound = "__base__/sound/item/ammo-large-inventory-move.ogg",
pick_sound = "__base__/sound/item/ammo-large-inventory-pickup.ogg",
drop_sound = "__base__/sound/item/ammo-large-inventory-move.ogg",

now to fix like a dozen other mods that got broken today =[

You can also just add this to the top of the item file

local item_sounds = require("__base__.prototypes.item_sounds")

same error:
Failed to load mods: Mammoth-MK3/prototypes/item.lua:160: attempt to index global 'item_sounds' (a nil value)
stack traceback:
Mammoth-MK3/prototypes/item.lua:160: in main chunk
[C]: in function 'require'
Mammoth-MK3/data.lua:1: in main chunk

idk none of that^ fixed it :(

no, it works, you just have to change
local sounds = require("prototypes.entity.sounds")
to
local item_sounds = require("base.prototypes.item_sounds")
in \Mammoth-MK3_1.0.9.zip\Mammoth-MK3_1.0.9\prototypes\item.lua
thank you noxabellus

I will updeate soon, but you can find the fix at the top of the item.lua and mammoth.lua there is a line commented out I put there ready for this bug!

lol I thought I did but that was in my build ooops