Whenever I try to finish the make bows not war quest, it says that season 8 is required.I didn't have season 8 as I've just come back from warmind, but i have the season 9 pass. Even if you're not supposed to be able to finish the quest now, it makes little sense that i was still able to start the quest, and i wasted a good hour and a half getting to the end of a quest that at the moment the game wont even let me finish. Either remove the quest starter so other people dont end up wasting their time, or let season 9 players finish the quest as well. I've seen a bunch of other threads from up to 2 weeks ago and they all said that it would be addressed soon and that it's a known bug, but nothing's been done about it so far. Bungie themselves said "The Leviathan's Breath exotic quest if players didn't own the Season Pass. This will be available to players who own a Season Pass either now or in the future." Which implies that i should get to do it, as a pass owner
Quest was season 8 and should not still be available. See the numerous other posts on this issue for more info.