I’m stuck in the Worgen start zone, i’m following Liam into battle and as soon as we arrive in Gilneas, he juts to the left then disappears. I’ve tried with No addons, waiting 24 hours, different PC but the issue still remains.
I’ve opened a ticket but the wait times are huge so I’m hoping that somebody might have an idea on here.
It has always been kinda buggy just try to go to the end where Greymane and Sylvanas fight (Greymane Court) and see if you can complete it.
If in the end you’re not stuck then report a bug and continue playing.
Cheers, that worked 
edit:
Just in case somebody else has the same issue, later on the next quest where you follow Tobias into the catherdral also bugged out and i needed to relog and quit / accept the quest again for it to work.