SIPT Error League Of Legends Fix | Failed to receive platform SIPT

The “SIPT” error in League of Legends typically appears as the message: “Failed to receive platform SIPT.” This error usually means your game client is struggling to retrieve essential configuration data from the Riot servers, often due to a connection handshake failure, ISP throttling, or a DNS issue.

Here is a step-by-step guide to fixing it, ordered from the easiest to the most complex.

1. The Quickest Fixes (Try These First)

• Restart Your Router/Modem:

  • Unplug your router from the power source for 60 seconds, then plug it back in. This clears out temporary cache issues that often cause the SIPT handshake to fail.

• Restart Your PC:

  • Sometimes the Riot Client background processes get stuck. A full reboot forces them to restart.

2. Change Your DNS Server (Most Effective Fix)

This is the most common solution for the SIPT error. Your ISP’s default DNS might be blocking the specific server request.

1. Open the Control Panel on your PC.

2. Go to Network and Internet > Network and Sharing Center.

3. Click on your active connection (e.g., Ethernet or Wi-Fi).

4. Click Properties.

5. Select Internet Protocol Version 4 (TCP/IPv4) and click Properties.

6. Select “Use the following DNS server addresses” and enter:

   • Preferred DNS server: 8.8.8.8 (Google)

   • Alternate DNS server: 8.8.4.4 (Google)

   • (Alternatively, use Cloudflare: 1.1.1.1 and 1.0.0.1)

7. Click OK, close the windows, and try launching League.

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3. Flush Your DNS and Reset Winsock

If changing the DNS didn’t work, you might need to clear your computer’s current network cache.

1. Press the Windows Key, type cmd.

2. Right-click Command Prompt and select Run as Administrator.

3. Type the following commands one by one, pressing Enter after each:

   • ipconfig /flushdns

   • ipconfig /release

   • ipconfig /renew

   • netsh winsock reset

4. Restart your computer after the last command.

4. Allow League Through Firewall

Your Windows Firewall might be treating the specific SIPT data packet as a threat.

1. Type “Firewall” in your Windows search bar and open Firewall & Network Protection.

2. Click “Allow an app through firewall.”

3. Click Change Settings (you may need admin rights).

4. Find League of Legends and Riot Client in the list.

5. Ensure both the “Private” and “Public” checkboxes are checked for both apps.

Summary

• Server Status: Before diving deep, check Riot’s Service Status page to make sure the servers aren’t actually down (SIPT errors often spike during outages).

• ISP Restrictions: If none of the above works, try connecting via a VPN or a Mobile Hotspot temporarily. If the game works on the hotspot, the issue is strictly with your home Internet Service Provider (ISP).