Here's how you can fix the Error Code 51900101 in World of Warcraft once and for all.
Huge MMO games like World of Warcraft are always at risk of being stuck by some error codes. Out of many, Error Code 51900101 is one such issue that throws the players out of the server. Further, it makes players unable to log in again. This error code most probably popped up due to some server issues from the developer side. Don’t worry, there is a way to fix the World of Warcraft Error Code 51900101. Check out this guide to know.
For many players, the error code 51900101 was fixed after deleting the cache folder from the World of Warcraft game directory. However, doing so will delete some in-game data like Keybindings, user interface, addons, etc. So, make sure that you have saved your preferences. To delete WoW Cache, follow these steps.
Once done, relaunch World of Warcraft again and you will see that the error code 51900101 is fixed. And about the Cache file, it will automatically be created again by the system. Also, make sure that you have disabled your Antivirus and Firewall before playing World of Warcraft. They restrict the game from accessing servers and hence cause such issues. For your reference, here are the steps to disable it.
That’s pretty much everything you can do to fix the error code 51900101 in World of Warcraft. Apart from this, there’s another Error Code 51900102 that can trouble you. Thankfully, we have a guide to resolve that error as well.