Still facing the same issue with my main Monk Char since yesterday 
but everything works fine with my DH alt which is so odd. Anyone else facing this issue?
Everytime I login to my monk char the screen freezes then I get the error WOW51900328 and disconnects me. My network is fine, internet is fine. And I did all the diagnostics on WOW’s support blog post. Uninstalled addons, replaced cache files, etc. Still does not work for my main
Blizzard support please fix this, I want to play my main!!
That sounds like a stuck character.
Try using the self service on the website for stuck character.
I tried it. It still doesnt work. My friend tells me that whenever I login there is a split second saying that I am online, then immediately says it goes back offline. And that is what is happening on my screen as well. Enters the world then the screen freezes and says I disconnected. Alt works completely fine thought which is odd.
This is happening to me as well. Missed the entire raid night.