EVERY TIME that a new update of the mod is released, please perform the following procedure so to avoid that in your mod folder will remain old files that may provoke issues and malfunctions.
I know this procedure may sound annoying to be done every time that an update is released but it's the only one that guarantees that our mod will work without issues.
This issue it's not our fault nor provoked by us but instead it's fault of the system that Steam decided to use when a developer of a mod have to to upload or update his mod in the Workshop.
The system used by Steam to manage these kind of things, in fact, can be only described as " crap ", to say the least...
The following procedure is well tested and " bullet proof " and it will guarantees that your mod is correctly installed from a user point of view.

1- Disable all mods you may have activated, then exit the game

2- Once completed go to the Warfighter mod page and unsubcribe from it

3- Do the same with the Ukraine at War mod

4- Once done check that in your 302670 folder there is no trace left of both mods.
If you notice that some files pertinent to the WF or UAW mods have been left behind in your 302670 folder, delete them all

5- Once done back to the Warfighter mod page and subscribe again to it

6- Do exactly the same with the Ukraine at War mod

7- Once done run the game and activate the Warfighter mod first and then the Ukraine at War mod without exiting the game.
Brief procedure about this passage:
a) Activate WF and click the " APPLY " button.
b) Once done activate the Ukraine at War mod then click the " APPLY " button

8- Done this double-check that both mods are highlighted in green colour ( Green colour stands for " Activated " )

9- Now if all is like reported above, restart the game ( This passage will put all the modifications brought by the mods in full effect )

10- Once the game has been restarted go to the " HOME " tab, then the " WORKSHOP " one and double-check that both nods are still highlighted in green colour ( This check is required because from time to time the game auto-decides to disable mods by itself )

In the case that you notice that one of the two mods is not highlighted in green colour repeat the procudure from step #7

If you followed this procedure correctly your mod will be fully and rightly installed and ready to provide you a lot of hours of fun and entertainment!

*IMPORTANT NOTE: DO NOT ACTIVATE ANY OTHER MODS IF YOU DON'T KNOW EXACTLY WHAT YOU'RE DOING, IT MAY HAVE UNEXPECTED BAD EFFECTS ON BOTH THE WARFIGHTER AND UKRAINE AT WAR MODS!!!