There's a Discord quest?

So, I’ve just been told by friend there’s some “Discord quest” for a skin. I look it up on reddit and turns out it’s been up for at least 10 days. I’ve got “quest enabled 3/25” and the skin is on 99% with “claim reward” greyed out. Is it over? If it is, why does it still show up in my Discord? Connecting Discord with BNet didn’t do much.
I’ve got BNet and Discord turned on every day and I’ve seen no pop-up about it on neither, so I’m gonna say this was rather poorly communicated.

All you have to do is pull up the quest, watch the short promo vid to completion and then claim. You get a code to redeem the LW Frozen Seer skin from the store.