I am on PS5 and I reached step 6 on the Rogue network quest got access to the room to focus armor and weapons but the quest dissapeared from my quest tab and now I can't focus anything in Vesper's Host anymore. I don't know where to go to submit a report to try and get this fixed.
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Abandon the quest and then reacquire it from spider, then (after creating a fireteam finder and gathering your team) start the dungeon fresh and make sure that you are the fireteam leader. This worked for me