I don't get this because the first time I played the game after I killed Kellog I went back, talked to Piper and Valentine and was told to go to the memory den.

Second time playing after I killed him and also picked up the cybernetic augmentor but it just says "search for more information" and I can't get Valentine to direct me to the memory den, nor can I go there myself and speak to Amari, just says she's busy.

Anyone know what I've done wrong for the quest not to progress or if it's bugged? The only difference I can think of is I tried another companion before ending this mission besides Piper and Valentine. But I switched back to Piper to complete the reunion quest.

Do you have that certain item which is necessary for the next part? A certain loot from Kellog?

There's also a terminal near him you should have a look through.

Damn it, I found out why. I accessed Kellogg's terminal to open the doors to get out but I have to look at the logs as well. Thanks for the heads up!