Fix Unable to connect to authentication service LMHT error

However, you can quickly join League of Legends right after applying the following shared Unable to connect to authentication service League of Legends fix.

Each League of Legends update brings improvements and innovations, but also comes with bugs that make the MOBA gaming experience less fun. After the latest League of Legends 11.1 update, there was an error code that plagued many players around the globe. That is the Unable to connect to the authentication service error.

Since an error message may appear when selecting a champion, at the login screen or in the middle of a match, it is not possible to pinpoint the exact cause behind the problem. However, there are some easy-to-implement solutions that have been shared and in this article, Tamienphi.vn has summarized how to fix the Unable to connect to authentication service LMHT error.

1. Check server status

League of Legends players encountering this issue need to first check the server status for their specific region, as the issue is likely on Riot's side. You can visit the Riot Games Service Status website to check the League of Legends server status, to rule out the possibility that the Riot Games server is down. Riot usually maintains servers when they need to resolve critical bugs or issues in the game, and sometimes during the update process.

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Follow the instructions on the screen, choose the desired language and then select the game for which you want to check server status. In this case, it would be League of Legends.

Visit the Riot Games Service Status website HERE

2. Turn off firewall

The Unable to connect to the authentication service error can often be caused by the Windows Firewall. If you see a League of Legends server in your respective region in good working order, then it's possible that the problem is with a firewall settings blocking your Internet access. You can turn off the trick wall with the following steps:

Step 1: Search for Control Panel in Windows Search and select System and Security> Windows Defender Firewall.

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Step 2: Next, click on the option Turn Windows Defender Firewall on or off located on the left side of the window.

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Step 3: Check the option Turn off Windows Defender Firewall and click OK to save the changes.

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3. Reinstall the game

If the above two solutions didn't work, then reinstalling the game might be the next ideal option for you to consider. Maybe the update League of Legends 11.1 has damaged certain files in the game that can be easily fixed by repairing the file or reinstalling League of Legends from scratch.

4. Contact customer support

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Riot's customer support is famous for responding quickly and giving the fastest possible fix. Just by submitting a complaint on Riot's official website, League of Legends players affected by this bug can get a resolution when another fix fails.

Contact Riot customer support HERE

Above are some measures to fix the problem of not logging in League of Legends due to the error Unable to connect to authentication service LMHT. Try each one in turn to see which one works for your case.

Kareem Winters

Update 11 January 2021

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