Requirements to "Stained Soul" quest

I killed the KoC Akyrum for the first time yesterday, but the Stained Soul quest doesn't show up for me (DW) and my friend (BW).
Another DW did get the quest immediately, but after 24 hours nothing has showed up yet.

Since I couldn't find anything about this, what are the requirements to get the quest?

Thanks.

From what I heard, it's bugged. Nothing you did wrong.

Can anyone confirm this or has similar problems and knows how to fix it?

It's definitely bugged, I tried it on my NW yesterday.

Still bugged after the patch? Idk if I meet all the requirements or not, so I figured I'd ask as I am not able to do the quest either. All I have for Cygnus atm, is a lvl 25 quest, I wonder if I have to do all that?

Yep still bugged, can't accept the quest at all.