Ruby Feast frustration

I am exceedingly vexed by the Ruby Feast quest and its inconsistency, Please help.

What is the prerequisite for this to show up for any toon? On some alts, the banner has appeared with quest marker in Valdraken, and I have been able to add to quest log. On other toons, it hasn’t.

if, as I think happened on my main toon, the quest was dropped, is there anyway to reacquire it? because the damned quest marker is not showing up for her in the inn in Vald. My main toon has completed all quests in Waking Shore and elsewhere.

this is really frustrating. Ideally I would like to do the toon on my main for the achievement( What a long, sweet etc etc).