Having a VIP account supposedly grants access to all adventures, but there are a few within Evenstar that claim i have to buy the underdark pack. Both The Riddle and Murder By Night will not let me enter currently, but i was able to pick up the quests. When i tried to enter on a lvl 18 it said i need to buy the kings forest as part of the Underdark pack. The other quests in Evenstar gave me no trouble.
So is this a bug, or some hidden limitation of my VIP membership?