Official explanations only · checked 18 October 2026
tools/error-codes Error Codes
More on World of Warcraft: requirements, patch notes and more.
World of Warcraft: 28 error codes explained by Blizzard Entertainment, including WOW51900319, WOW51900123, WOW51900101, WOW51900102, WOW51900118 and WOW51900128. Each line gives what Blizzard Entertainment says the code means, what it says to do, and a link to its page. No official explanation is published for BLZ51900003.
| Code | What it means | What Blizzard Entertainment says to do | Source |
|---|---|---|---|
WOW51900319 |
The game lost its connection with the World of Warcraft servers. | Check @BlizzardCS for server status; if none, follow the Connection section of World of Warcraft Technical Troubleshooting. | Official page updated 18 Aug 2026 |
WOW51900123 |
Typically happens when there is an issue affecting Blizzard's authentication servers. | Check BlizzardCS; if there are no issues, follow the Connection Troubleshooting article. | Official page updated 8 Oct 2026 |
WOW51900101 |
Disconnected from Blizzard Services - the game lost its connection with the WoW servers. | Check @BlizzardCS; if no server issues, follow Troubleshooting Connection and Latency Issues. | Official page updated 5 Feb 2026 |
WOW51900102 |
A disconnect typically caused by a connection issue. | Follow the Connection Troubleshooting article. | Official page updated 8 Oct 2026 |
WOW51900118 |
Occurs during Battle.net maintenance. | Check Breaking News on Blizzard Support for maintenance times and log in after it ends. | Official page updated 13 Oct 2026 |
WOW51900128 |
A disconnect typically caused by a connection issue. | Follow the Connection Troubleshooting article. | Official page updated 5 Feb 2026 |
WOW51900209 |
listed without explanation (cannot connect to a Europe region WoW account). | Check BlizzardCS and Realm Status, update the game, pick the correct Region/Account above the Play button, and reset your UI. | Official page updated 8 Oct 2026 |
WOW51900223 |
listed without explanation. | Check for updates, reset your user interface, run the repair tool, and reinstall if it persists. | Official page updated 8 Oct 2026 |
WOW51900322 |
A streaming error - data is not streaming properly from the WoW servers to your client. | Check BlizzardCS and Realm Status, update and reopen the game, and reset your user interface. | Official page updated 8 Oct 2026 |
WOW51900323 |
A disconnect caused by an issue with data streaming for the WoW client. | Follow the Connection steps in WoW Technical Troubleshooting; delete the Battle.net cache folder and files if it persists. | Official page updated 8 Oct 2026 |
WOW51900325 |
A disconnect caused by an issue with data streaming for the WoW client. | Follow the Connection steps in WoW Technical Troubleshooting; delete the Battle.net cache folder and files if it persists. | Official page updated 8 Oct 2026 |
WOW51900328 |
listed without explanation (seen after patching). | Check Realm Status; if your realm is up, restart, reset your UI and add Blizzard apps to your security software's exceptions. | Official page updated 14 Jul 2026 |
WOW51900331 |
You are trying to play WoW Classic on a WoW account with no active subscription. | Use the Battle.net app account selector to switch to a subscribed WoW account, or add a subscription. | Official page updated 12 Oct 2026 |
WOW51900334 |
Normally seen when there is an issue with a specific server or variant of WoW. | Log into another server or variant (e.g. Retail instead of Classic) and report it on the WoW Forums. | Official page updated 27 Apr 2026 |
BLZ51900001 |
listed without explanation (disconnect, troubleshooting framed for after patching). | Check Realm Status, reset your UI, add security software exceptions and configure firewall/proxy settings. | Official page updated 8 Oct 2026 |
BLZ51900012 |
You don't have a valid game account to log in to (e.g. no PTR or WoW game account attached). | Make sure a WoW game account is attached to your Battle.net account; for PTR, check you have a PTR account and the server is up. | Official page updated 5 Feb 2026 |
BLZ51900057 |
Your World of Warcraft account has been locked (access temporarily disabled). | Contact Blizzard for more information. | Official page updated 5 Feb 2026 |
BLZ51900062 |
Disconnected because account information changed, or a server issue. | Check Recent Login Activity; if there was no unauthorized access, log back in. | Official page updated 5 Feb 2026 |
BLZ51900073 |
A server problem, too many game accounts on the Battle.net account, or a Parental Controls setting (also shown as Error 73). | Remove unwanted Starter Edition accounts, check Parental Controls time zone and playtime limits, troubleshoot your connection, then contact Blizzard. | Official page updated 25 Mar 2026 |
BLZ51901016 |
Your PC doesn't meet the system requirements or you have a connection issue (can stick at retrieving the realm list). | Check the minimum system requirements, update drivers and OS, and troubleshoot your connection. | Official page updated 8 Oct 2026 |
BLZ51903006 |
A disconnect typically caused by a connection issue. | Follow the Connection Troubleshooting article. | Official page updated 8 Oct 2026 |
BLZ51903021 |
"An Error has Occurred" - the game lost its connection with the WoW servers. | Check @BlizzardCS; if no server issues, follow the Connection section of WoW Technical Troubleshooting. | Official page updated 20 May 2026 |
BLZ51914003 |
Corrupted or damaged game files. | Use the repair tool. | Official page updated 8 Oct 2026 |
BLZ51914400 |
A login error that occurs when the game loses its connection with the WoW servers. | Check @BlizzardCS; if no server issues, fully update WoW and follow the Connection troubleshooting. | Official page updated 2 Jun 2026 |
BLZ51918018 |
listed without explanation (disconnect). | Reset your password to refresh your Battle.net account; contact Blizzard if that fails. | Official page updated 1 Sep 2026 |
BLZ51934200 |
Occurs during Battle.net maintenance. | Check Breaking News or the Realm Status page and log in after maintenance ends. | Official page updated 5 Feb 2026 |
Error 132 |
A generic fatal-exception crash code that may come from outdated addons, corrupted files, incompatible drivers or hardware. | Update drivers and OS and reset your user interface, then follow the remaining steps in the article. | Official page updated 8 Oct 2026 |
ERROR #134 (0x85100086) |
WoW was prevented from changing a game file (permissions, a security program, or a file error). | Add Blizzard apps to your security software's exceptions and update drivers and OS, then follow the remaining steps. | Official page updated 8 Oct 2026 |
No official explanation published for BLZ51900003, as of 18 October 2026. We do not list unofficial fixes.
Quick answers
tools/error-codes error questions
What is World of Warcraft error WOW51900319?
The game lost its connection with the World of Warcraft servers. Blizzard Entertainment says: Check @BlizzardCS for server status; if none, follow the Connection section of World of Warcraft Technical Troubleshooting.
What is World of Warcraft error WOW51900123?
Typically happens when there is an issue affecting Blizzard's authentication servers. Blizzard Entertainment says: Check BlizzardCS; if there are no issues, follow the Connection Troubleshooting article.
What is World of Warcraft error WOW51900101?
Disconnected from Blizzard Services - the game lost its connection with the WoW servers. Blizzard Entertainment says: Check @BlizzardCS; if no server issues, follow Troubleshooting Connection and Latency Issues.
What is World of Warcraft error WOW51900102?
A disconnect typically caused by a connection issue. Blizzard Entertainment says: Follow the Connection Troubleshooting article.
What is World of Warcraft error WOW51900118?
Occurs during Battle.net maintenance. Blizzard Entertainment says: Check Breaking News on Blizzard Support for maintenance times and log in after it ends.
What is World of Warcraft error WOW51900128?
A disconnect typically caused by a connection issue. Blizzard Entertainment says: Follow the Connection Troubleshooting article.
What is World of Warcraft error WOW51900209?
listed without explanation (cannot connect to a Europe region WoW account). Blizzard Entertainment says: Check BlizzardCS and Realm Status, update the game, pick the correct Region/Account above the Play button, and reset your UI.
What is World of Warcraft error WOW51900223?
listed without explanation. Blizzard Entertainment says: Check for updates, reset your user interface, run the repair tool, and reinstall if it persists.
Why is my World of Warcraft error code not listed?
We list only codes Blizzard Entertainment explains. As of 18 October 2026, no official explanation is published for BLZ51900003.
Each meaning and fix is a one-line summary of the publisher's own page, linked on its row. Publishers update these pages; we re-check monthly. All games.