Known Issue: [quote]• Allegiance Quest: We are investigating an issue where players cannot progress past Spider's Black Market in the Allegiance quest.[/quote]https://www.bungie.net/en/Forums/Post/252323677?sort=0&page=0
It's been bugged for I think a month now. Bungie are aware and are "fixing" it, but that's all their answers ever say. I'd really like to just finish this quest on my titan once and for all.