This happened for me over the weekend as well. Also, after home from work.
I feel like I was roped in like that dad wielding the axe on the commercial. The reality is, that commercial is accurate as that;s what I am going to do now. Rage outside!
Same here, every time Iām able to actually get logged in, if I turn in a quest, I immediately d/cā¦ weird. then it throws this error code.
They finally said its authentication errors on the breaking news tab.
Canāt log in to game either
weird, I havenāt played that character in agesā¦
Same here my fellow Azerothians, I am in Indiana for reference.
Stuck at connecting to servers myself
I just got this issue. Been stuck for 20 minutes, constantly DCāing at the character screen. Was able to play for about an hour.
Same thing happened - been out for about 30 minutes. Sometimes I got as far as the toon list, sometimes just stuck at connecting.
Same issue, been trying to reconnect for an hour now. 
same here, over an hour
I bought the new expansion 1h after launch, maybe this is affecting new buyers.
Itās not just you, itās affecting me as well on Duskwood and Iām not a new buyer
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The last clean release I remember was Burning Crusadeā¦ since then issues on every xpac releaseā¦ hmmmā¦ why do we Beta again?
If you have this problem again, try deleting the Cache folder. Worked for me.
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Also unable to log in, getting same error message (WOW51900324)
Edit: Scratch that, kept trying and it just finally let me in