There was a similar mistake when those cosmics were first added to the game. Their in-game description had left out the Max Awaken part, but it only worked on the fully maxed version. Was updated fairly quickly at the time. As a general rule, if a character can be awakened, their cosmic only ever works on the Max version. Would be nice if they worked on any version though, make them a little more accessible for people.
You don't really need an image for this one... but here you go anyway. Go get your kitty-katt! 500 runs in LoL will earn you 1,000 Forged Fragments, and hopefully enough Skogkatt frags to buy a set of Babylon talismans or a Horus cosmic.