Anduin Missing for Hero's Call: Twilight Highlands!
Common ProblemsI can't complete Hero's Call: Twilight Highlands! to start question in the Twilight Highlands.
If you abandon the initial breadcrumb quest "Hero's Call: Twilight Highlands!", this should allow you to start the quest chain by speaking to Fargo Flintlocke in Stormwind Harbor and accepting the first quest "Twilight Shores".
We are working on resolving the issue with the breadcrumb quest in the meantime.