Note : This applies to ANY "File not found" error that the game gives. You can also do the same with other errors such as -

• APP_ERROR: File not found - resource/map/... ( this is the map.pak)
  
• APP_ERROR: File not found - resource/texture/.. (this is the texture.pak)
  
• APP_ERROR: Can't Open pakmods.. (Make sure you have adimin priviliges)

Just replace these steps with the file you have an issue with and follow along.


Error I had : https://i.imgur.com/psDkHy4.png

Explaination : the small_richochet.mtl is not present within the "texture.pak" file that is present in the mod folder.

The issue here was the texture file is NOT being copied on the mod extraction that the game does. (I didn't have any space left)

So first make sure you have atleast 10GB left in the disk.

Second Go to the "mods" folder in your installation.
Follow this path
SteamLibrary\steamapps\common\Men of War Assault Squad 2\mods\f&u terminator v1.86\resource

Then On a separate tab open this following path (or find the mod folder which have been downloaded)

SteamLibrary\steamapps\workshop\content\244450\782557129
(Number maybe different so browse around to find the same file structure)

Refer to the screenshot : https://i.imgur.com/aCxGQsj.png

As you can see the texture.pak file is not being moved to the mods folder when the game copies over the mod files.

Just copy that file over

File count should be similar on both folder ( Mine is 98 Files and 12 Folders 4.58GB's)

Now go back in to the game and disable the mod. and then apply. And then enable it back again just to test.

Have fun ~