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Image via Riot Games

League of Legends error code 0U, explained

The client is a mystery somtimes.

League of Legends has a separate client interface, allowing you to interact with your friends without actually playing the game. Though this is convenient for those with slower PCs, bugs affecting the client can prevent players from joining matches even if the servers are up and running. The origins of error code 0U are unclear, but it’s been an issue for some time now.

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Riot Games acknowledged the issue and confirmed it’s working on a fix, but that doesn’t mean you have to wait with your hands tied until the developer finds a permanent solution to the problem.

There are a couple of temporary fixes you can try out, but none of them can fix the error for good. The chances of error 0U reappearing are still high, and you’ll need to wait for Riot to patch out this minor annoyance.

How to fix error code 0U in League of Legends

Riot hasn’t disclosed an official solution method yet, but Riot advised League players who contacted the support line to run the Hextech Repair Tool if they had issues with error code 0U.

Hextech Repair Tool is a utility program developed by Riot that automatically runs a troubleshooting session. The Hextech Repair Tool has multiple tools at its disposal to detect corrupt game files and can reinstall a patch or the game itself.

Before using the Hectech Repair Tool, we recommend adding League as a Firewall exception and repatching the game. If these two options don’t fix your problem, reinstall League through the Hextech Repair Tool. The tool collects all of your game logs, which you can send to Riot support to help pinpoint the root of this issue.

The method above isn’t guaranteed to work for everyone. Even players who successfully bypassed the error by reinstalling were greeted with it once again after some time.

Keep an eye on the support page to track Riot’s progress regarding the error. If you’re determined to play the game, you can continue to try your luck by attempting to log in after receiving the error.


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Jerome Heath
Senior editor
Senior editor at Dot Esports. Jerome has been in and around the gaming industry for the last eight years, and he's not going anywhere anytime soon.
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