Trouble with War of Shadows and the mission control desk

[Spookums]

I'm a Zandalari troll and I can't seem to send anyone on any mission. I'm not quite sure what I'm missing, if I need an item I don't have or if it's a bug?
I need to send Arcanist Valtrois on a mission but every time I drop her into the follower slot and select start mission, it makes a noise but nothing happens; no "in progress" missions and none of my war resources are spent.
Anyone have an idea on how to get around this? or should I make a bug report?