1. League of Legends error codes list
Riot updates League’s client constantly, which doesn’t ease the blow on players in terms of the number of errors they get. Though every new patch fixes some known bugs, they also introduce new ones. Troubleshooting for each of them may look like a dreadful task but almost all of the new errors resemble the old ones that aren’t a surprise for a decade-old game.
While it may sound simple, we recommend restarting your PC and all running processes of League before trying out any of the solutions below since most issues tend to fix themselves.
Here are some of the most common errors in League that prevent players from hopping into the game and how to fix them.
League of Legends Error Code 004
The error usually occurs when the client fails to patch the game. Upon clicking on “OK” it causes the client to shut down and requires a restart.
Failing to download or install an update either means there was a connection problem or there wasn’t enough disk space. Make sure that your connection is solid and you have enough space on your SSD or hard drive.
2. Error Name
This error is a well-known indicator of Riot Games’ servers being overload and causes players to disconnect or use the basic features of League.
Since this one’s a server related problem, your best bet is to keep trying to log in. Keeping an eye on League‘s Twitter account is also beneficial to know the current status of the servers.
3. Error Name
League of Legends Error 1B
The 1B error is usually related to ISP problems that mess players’ connection to the League servers. It prevents players from logging into the game.
Though the issue is known for fixing itself in a couple of hours, you can try running the League client on administrative mode. If it doesn’t work, we recommend repairing your client.
4. Error Name
Under maintenance error
This error mostly affects Linux users and prevents the League client from receiving updates.
Repairing the client has the highest chances of success to fix this problem. If that doesn’t do the trick we recommend deleting RiotClientServices.old and ucrtbase.dll before giving it another go.
5. Error Name
Unexpected Error With Login Session
The login session error tends to arise when another instance of a League client gets stuck running in the background.
To fix the error, launch the task manager and end all the tasks related to League. Open up the client after that. If it doesn’t fix the error, we recommend initiating a client repair.
6. Error Name
Though the reason behind the error is unknown, it prevents players from logging into the game by blocking their access to the client.
The error is more of a Windows issue. Simple troubleshooting steps seem to give results, however. Try running the League client in administrator mode. If it doesn’t fix the problems, reinstall League after deleting all the files related to the game.
7. Error Name
A critical error has occurred
The critical error is caused by other programs which feature overlay options while playing games, it prevents players from logging into League.
Close all programs that have an overlay-like feature like Steam, Origin, or Discord. Then locate your local League folder to delete config and data folders.
8. Error Name
Unexpected Login Error
This error usually shows up with a shaky connection and prevents players from downloading updates or log into the game.
We recommend performing a router reset and also changing your DNS. If these don’t work try contacting your ISP and let them know about your problem.
9. Error Name
Unknown direct x error
This direct x error appears during graphical instabilities and prevents players from launching the League client.
Though the error message prompts players to update their graphics drivers, deleting the game.cfg file should also fix the problem.
10. Error Name
League of Legends Error Code 002
Much like the error code 004, this error also disrupts the patching process and makes it impossible to log into the game.
This is also another storage-related error. Make sure that you have enough space on your data drivers. If that doesn’t seem to be a problem, try turning off your antivirus since it may be detecting a false-positive within the update files.
11. Error Name
The program can’t start because d3dx9_43.dll is missing from your computer.
This error mostly occurs in new PCs and prevents players from starting a match.
Completing all the available Windows updates before launching League usually gets it done since the updates include the missing file. If this doesn’t work, we recommend manually installing the file via the DirectX End-User Runtime Web Installer.