Try relogging in Dalaran then go find the first quest NPC.
(Also try deleting your cache if necessary); if that doesn't work, make an in-game ticket and ask for some informations regarding your issu ...
There are multiple options to your problem; hopefully I'll help you here with the few knowledge I acquired over the months using different game launchers.
-Are you sure you've unticked "Read onl ...
Topic: 
World of Warcraft
