Basically the quest starts and there is no dialogue or objective markers like there's supposed to be according to walkthroughs. The objective text states "Investigate Hive Activity: Head to Sorrow's Harbor and investigate the strange Hive congregations within," but nothing occurs if you head to Sorrow's harbor or kill enemies. It seems it's bugged in it's entirety.
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Hi all, I've found a work around for the issue and listed it in a comment here, but the issue seems to be Altars of Sorrow. If you can force it to matchmake you solo then you should be able to progress it. https://www.reddit.com/r/DestinyTheGame/comments/ux08le/stuck_on_in_search_of_answers_mission/