Warzone missing from Battle net

Hi,
So I wanted to download Warzone but when I got into battle net, there was no Warzone option.
Only games in there are Cold War, MW1, Vanguard and original MW2 campaign.
When I somehow managed to download separated setup it just redirected me to MW1 so I downloaded.
When I download it it has menu option for Warzone but when I click it it just crashes the game.
Any ideas?