How to fix error wow51900118 in World of Warcraft

This issue may be due to Battle.net being under maintenance, in this case our only course of action is to wait patiently for the maintenance to conclude and for Battle.net and the servers to resume operations, it is one of those inevitable errors that are out of our control.

Another method that we can apply is to check the Internet configuration, restart the router and use the classic method of turning it off and on again, this with the aim of ruling out any potential problem on our part.

Another potential answer to this problem is that if we discover that other players can access WoW while we cannot, this could mean that our specific realm is not available yet, to confirm this we can check the official WoW realm status page to check. If our realm is down and if it is not, it is simply expected to come back online, in which case we will have to wait for Blizzard to finish implementing the patch, update or maintenance before our kingdom is accessible again.