The 'Unable to connect to authentication service' error is a common issue in League of Legends, often occurring when establishing a secure connection to Riot's services becomes challenging. Don't worry; we're here to help with a few easy steps.
Check Server Status
Your first step should be to check the server status. The issue might not be on your end. Visit the official Riot page, which will inform you if there are any ongoing problems in the game. If League of Legends is experiencing issues, you may need to wait it out.
Restart your Computer and Router
Try the obvious solution - restart your computer and router. This might resolve some temporary issues with your system. If you still can't connect to the League of Legends services, proceed to the next steps.
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Clean up your DNS Cache
If the issue persists, consider flushing your DNS cache. It's not as complicated as it may sound. From your Start Menu, search for Command Prompt and run it as Administrator. Inside the CMD, type ‘ipconfig /flushdns’ and hit Enter. Restart the application and check if you're still facing connection problems.
Disable Firewall
League of Legends might be struggling to pass through your firewall. Try disabling it and see if this resolves the issue. Enter the Run Command (press the Windows key and the R key), type ‘control firewall.cpl,’ and press enter to bring up Windows Defender Firewall. Click on 'Turn Windows Defender Firewall On or Off' and turn it off. Now try running the League of Legends Client.
Contact Support
If the issue persists and none of these steps helped, don't hesitate to get in touch with Riot support. Feel free to contact them via their official page.
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