Eldritch voidstone confusion.

Help please! :)

I don´t know what I am not understanding/missing with this questline.

Killed the Blackstar and Infinite hunger. I did searing/eater up to T16 and then.. nothing? Killed a T16 boss (2 different maps) with them both selected and nothing happens? No bar filling up like Maven, nothing dropping.

What I am not understanding?

Well, if someone reads this and have the same thing I managed to solve it.

Don´t know what did it but reboot and running a few Mavens and the invitation dropped.