The dreaded error code upon trying to log in is every World of Warcraft players nightmare. Just as your going into the game to quest or raid for the evening, you get stuck with a random error code that can remain for hours.
We have gathered a list of the twelve most common error codes and how you can potentially fix them without having to go through the lengthy process of contacting support or waiting for a patch.
The following fixes are also recommended by Blizzard technical support, however, If the following fixes do not work, you will have to contact Blizzard support to resolve the issue.
BLZ51900003
Fix - This tends to be an issue with an out of date security certificate on older versions of Windows. Try updating your Operating System to include all Service Packs and updates, and see if the issue persists.
BLZ51900004
Fix - This issue is caused during changing realms and it is best to wait 2-3 seconds between clicks when changing realms which may help the client crash less. It is also recommended that you conduct a DNS flush which also may resolve the issue.
BLZ51900308
Fix - This issue can be caused when logging into the Battle.net application and can easily be resolved by clearing out the Battle.net cache. If the clear cache does not resolve the issue, open your World of Warcraft folder (click Options > Show in Explorer) and open WoW.exe or WoW-64.exe, and log in manually.
BLZ51901001
Fix -This stems from the client being unable to connect to the server due to a connection issue. Make sure you are connected to the internet and run through the connection troubleshoot guide on the client to find potential causes. Make sure to check your Anti-virus software too! we can’t tell you how many times it has stopped the connection.
BLZ51901021
Fix - This error message indicates that something blocking or manipulating your SSL traffic, which Blizzard use to verify logins. This can be caused by malware, or by security applications who are blocking unknown SSL traffic. Check your anti-virus softare and download a malware detector such as Malwarebytes and run a complete scan.
BLZ51901356
Fix - This issue indicates an issue with security certificates on your machine. Again check your OS is completely up to date and run a scan for malware, usually this will solve the issue.
BLZ51914001
Fix - The game client is unable to connect to the server due to a connection issue. Check your connection and virus software. If the issue persists, run through the connection issue troubleshooter and if there is still a problem, contact support.
WOW51900007
Fix - Many Linux players began experiencing this error after 6.2.4 launched, but have found that updating WINE may resolve it. If not, check the forums or contact support.
WOW51900308
Fix - To fix this issue, log inot the client directly instead of Battle.net. In the WoW Tab of Battle.net, select Options > Show in Explorer and open WoW.exe or WoW-64.exe and log in using the in-game interface.
WOW51900314
Fix - If you are experiencing this when attempting to log in, double-check your username and password. If the issue persists, try changing your password in Account Management. If the issue persists, check your connection and virus software, if there the issue is not resolved, contact support.
WOW51900319
Fix - Check your connection and virus software, if the issue persists, contact support.
WOW51900329
Fix - While there is no die hard fix for this error code yet, some players have had success by checking their internet connection and virus software. Otherwise, contact support and be ready to provide infomation including the realm you are trying to connect to and the traceroute and pathping.
