Alexstrasza Missing In Valdrakken

I was on the quest “A Message Most Dire” & went to speak with Alexstrasza in Valdrakken & the NPC wasn’t there. I reloaded & again not there. I abandoned the quest & still not there. Relogged & again not there. The NPC is still missing… Help please.

Also, why is there no category for Valdrakken…?