#1 - Dec. 3, 2015, 2:56 a.m.
EDIT:
Until the build comes out that deploys the fix for this, there is an alternative to solution.
For all of the people who haven't started adventuring in Highmountain due to this error, there is a way to get there.
If you jump off of Dalaran, into the water you are able to get to Highmountain.
1.) Jump off the edge of Dalaran into the water.
2.) Summon your Azure Water Strider so you can water walk.
3.) Either go all the way to the east and go through Stormheim to get to Highmountain or
4.) Go between Stormheim and Suramar, up the river, in order to reach Highmountain.
Here is a picture of the route to take (thank you Frimlin)
http://i.imgur.com/iXC6Brd.jpg
WARNING: If you do touch Azsuna or Suramar it will port you back to Dalaran and you will have to start the walking process all over again.
Once you reach flight points in either Stormheim or Highmountain, you will no longer have to use your water strider to get back.