So i was trying to get the 4th catalyst for Barrow-Dyad. Story for this week was finished. I did the hive runes secret in the Founts. Then i shot the hive symbol. The door opened. I went through the labyrinth and went to the place, you have to slide through a little crevice to get down to it, where the blight should have been. The blight was missing. I checked if i did something wrong by watching multiple videos. Then i remembered i already was there and did all of this in the early beginning of ACT1 when i was running it with friends and already acquired Coalenscence of [Knife]. It didnt work retroactivly. I checked the quest kiosk, the relic on the conclave and the shaping slab. No quest or catalyst. So the last catalyst is not avaliable for me right now. I am playing on PC but this seems to be just a problem because i picked the Coalenscence of [Knife] already up in ACT 1 and is not retroactive.