League of Legends Error Code 004-lol: How to Fix It
Easy 10-45 minutes Medium Severity
Verified June 2026
- Error Code
- 004-lol
- Brand
- Popular Games
- Product Type
- game
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 10-45 minutes
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Tools You'll Need
- Web browser (to check server status)
- Task Manager (Windows) or Activity Monitor (Mac)
- Command Prompt with Administrator access (Windows) or Terminal (Mac)
- Stable internet connection
- Riot Games account credentials
How to Fix Error Code 004-lol
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Check Riot Games Server Status
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Restart the League of Legends Client
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Restart Your Router and Check Your Internet Connection
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Flush DNS Cache and Reset Network Settings
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Disable VPN, Proxy, or Firewall Temporarily
Only disable your firewall or antivirus temporarily for testing purposes. Re-enable security software immediately after testing. -
Run the Riot Client Repair Tool
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Clear the Riot Client Cache
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Reinstall the Riot Client and League of Legends
Reinstalling will not delete your account progress, rank, or purchased content — all of that is stored on Riot's servers. However, back up any custom settings or configurations you may want to restore.
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When to Call a Professional
If you have completed all steps including a clean reinstall and still cannot log in, contact Riot Games Player Support directly at support-leagueoflegends.com. Submit a ticket with your account username, the exact error code (004-lol), and a description of the steps you have already tried. A Riot support agent can investigate account-specific issues, flag compromised accounts, or escalate server-side login problems that you cannot resolve on your own.Frequently Asked Questions
What does League of Legends error code 004-lol mean?
Error code 004-lol is an unexpected login error in League of Legends. It means the game client was unable to complete the authentication process with Riot's login servers. This can be caused by server outages, corrupted local files, network issues, or interference from firewall and antivirus software.
Is error 004-lol caused by a ban or account suspension?
Not typically. Error 004-lol is a technical login error and is usually unrelated to account bans or suspensions. If your account were banned, you would normally see a different error message explaining the ban. However, if you suspect your account has been compromised or incorrectly actioned, contact Riot Games Support directly.
How long does it take for Riot to fix the 004-lol login error if it's a server issue?
Server-side issues causing error 004-lol are typically resolved within 1 to 4 hours. Riot Games posts updates on status.riotgames.com and their @RiotSupport Twitter account. If servers are confirmed as operational and you are still getting the error, the problem is likely on your end and the steps in this guide will help.
Does reinstalling League of Legends delete my account or progress?
No. Reinstalling League of Legends will not affect your account in any way. Your champion unlocks, skins, rank, match history, and all other account data are stored on Riot's servers, not on your local computer. You only need your Riot account username and password to restore full access after reinstalling.
Why does League of Legends error 004-lol keep coming back after I fix it?
If the error returns repeatedly, the most likely causes are an unstable internet connection, an antivirus or firewall program that keeps blocking the Riot Client, or persistent file corruption. Try running a permanent network speed and stability test, add the Riot Client as a permanent exception in your security software, and run the Riot Client repair tool again. If the problem continues, contact Riot Games Support for account-level investigation.