The launch of WoW Classic Season of Discovery has been a bumpy one, with errors galore popping up. You can many others might have run into the WOW51900333 error, but luckily there's a fix.
WoW error WOW51900333 fixes and solution
I know firsthand how frustrating these errors can be, and this one is tied directly to the launch of the Season of Discovery. If you're finding yourself facing this one, you will have been told by the game it's in reference to servers being full and congested. The only real fix to this is to switch servers or to just wait it out.
There's no need to relaunch WoW or anything of the sort. Blizzard added a second RPPvP realm to help alleviate issues like this, so they are monitoring problems with players being unable to get in.
Related: Active game time required in WoW Classic, explained
The problem is if you're trying to play on a specific server with friends, you'll have to simply wait until the error subsides or roll a character without them. It's not a perfect solution, but it's the only other option you have until the error solves itself.
There are growing pains to be had with the launch of the season, and the good news is these should all subside as time goes on and the peak popularity begins to die out. In the meantime, you'll have to keep your fingers crossed and hope you don't run into WOW51900333.
For more World of Warcraft Classic news and guides, check out WoW Classic not launching – How to fix on Pro Game Guides.
Eli Becht is a Contributing Writer at Pro Game Guides. He's an avid fan of battle royales such as Fortnite and Warzone to MMOs like World of Warcraft and Final Fantasy XIV. He has been covering video games since 2017.