League of Legends: Login Failure – What to do?


Partially, the League of Legends client logs in when they log in that an unexpected error occurred while logging in. Although Riot refers to the support page, which does not provide explicit help here. What you can do to log in again, we show you in this practical tip.

League of Legends: Login Failure – Start Repair

League of Legends: Login failed

League of Legends: Login failed

For errors, Riot provides its own repair tool in its client. First, try to resolve the issue with this one:

Start League of Legends.

Go to the top right of the gear icon. A pop-up window with various options will appear.

Click on “Start complete repair” and confirm the next note with “Yes”. The process can take some time now.

Then open League of Legends with administartor rights.

League of Legends: Error logging in – try other Wi-Fi

If you have set up guest access, the error message may also be due to this.

Log in to your W-LAN with full access rights and see if you can sign up for League of Legends now.

Login Error: Add Exception for LoL in Firewall

Exception for LoL in the firewall

Sometimes the firewall also blocks League of Legends content, causing an unexpected error.

This tip tells you how to add an exception in Windows Firewall.

We also have suitable tips for the popular suites from Avira and AVG.

Unexpected error – Uninstall and add program contents

New client causes errors

If nothing works, you can still try to uninstall individual components or the entire game and add them again. Changing to the new client sometimes causes problems with the update process. Reinstallation can then fix the error.

Uninstall the Pando Media Booster first. This often causes problems in League of Legends.

If the login still does not work, uninstall League of Legends completely and download the latest version of the client.

Perform the installation with admin privileges so that all important components can be reinstalled. If you want to boost your whole game, you’re recommended to use Boost Elo with Boosteria Company.


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