I’ve been disconnecting for an hour now constantly cannot stay in the game fore more then 2 mins. Getting the following error WOW51900319
I’m having the same issue 
Mine started a few hours ago was doing SoD, the issue did not start till we reached the last boss. No i can’t log onto a single character , I’ve tried logging multiple alts same issue disconnect after 2 minutes . Turned every addon off same thing. flushed my DNS and restarted my pc even did a repair on wow. Nothing seems to work.
I’ve read horror stories people having this exact same problem with months on end on this forum.