Everbloom Wilds Assault

I need the assault on Everbloom Wilds for the Securing Draenor achievement (and flying in Draenor). It finally came up on the mission table. I have the gray question mark over the quest giver. I have the quest in my quest log. I have the quest on my map, including the area outline on the minimap and the shaded area on the main map. But I don’t have the popup with the quest progress info, and I get no quest credit for killing mobs. Anyone know what might be going on and how I can fix it?