Installed the game on a new laptop (no kits, logos, faces etc installed). Started a save with Argentina. Team kits are not visible anywhere. This happens also with other national teams, club kits are visible… Has anybody else encountered this??  I tried installing 3d kits, but problem still occurs. I tried installing 3d kits for clubs, faces etc. Everything working except NT kits.  

I suspect you've put the files in the wrong place or there's a mistake in the config file.  They are working fine for me.

I can also see the Argentina kits on this screen. They are not visible on start screen (screenshot) and at the locker room screen before the match…

International kits don't seem to show on the start screen, though they do show on the locker room:

You are right! I can also see the kits on locker room. I can not see them on the starting 11 selection screen.  

When i manage both club and NT, i see on this screen the club kits.

I think it's just a quirk of the game, nothing you can do about it.

I agree. It must have occurred after the latest update. I does not happen on older videos, for example this: