This is the hunting fix they spoke about in patch notes. When all instances are bugged, shard crashes, and when it comes back online you can hunt again :)
Just checked their service status page, apparently they've had a fault open since 5:30 Monday about connectivity to some external internet sites - its apparently in the "we've pretty much fixed it, just doing final checks" stage... so not sure if its the same fault that's causing us all to lose connection to NW.
I don't think downloading the file will make a difference for me as the launcher itself loads fine and patches etc - I think its a case of "wait 15 minutes to be kicked for AFK so you get moved out of dungeon instance and back into regular game, then you can login"
Don't know who moved it, but... Exact same thing just happened to me - was in Crypts dungeon on Dragon shard, everything froze, I disconnected, and now cannot log back into the game...