Katalysatoren "Einstimmiger Chor", Quest "Chor:Ewig" geht nicht voran

[Krakeman]

Moin Leute, ich kann die erste geheime Truhe öffnen so oft ich will, für die Quest zählt es irgendwie nicht. Zugabe auf Experte hat gezählt. Ist irgendeine Voraussetzung nicht erfüllt?

[EckyThump]

Which chest are you opening?
If you mean the one for doing the cube puzzle near the beginning, that is part of the quest but it is not the chest the quest is looking for.

Firstly, if you have not already, you must have finished Specimen: NES007.

Once you complete the cube puzzle, you carry on through the activity until the last Vex conflux, in the next room will be some portals, one should be active (due to you finishing the cube puzzle), and there's a portal puzzle inside. The chest that appears there after solving it is the chest needed for the quest.

[Krakeman]

Thx for answer. I already finished all NES. On YouTube are some Vids about the secret treasures and you are right, the first one is near by the beginning. I also activated all three Vex Confluxes, the last one just before the boss fight. You mean, that I do the first treasure puzzle from the portal before the boss fight?

[EckyThump]

That's right yeah. The cube puzzle activates the portals, and the portals before the boss fight each lead to a puzzle for a catalyst chest. Those chests are the ones the quests look for.