This error is usually related to your local network or system settings. Please try the following steps in order.

Quick First Steps (Try These First)

• Fully restart the game and your computer.

• Restart your router and modem by unplugging them for 30 seconds.

Advanced Troubleshooting
If the quick steps didn't work, proceed with the solutions below.

1. Change and Flush Your DNS
   Your DNS server might be corrupted. Switching to a reliable one like Google DNS (8.8.8.8, 8.8.4.4) or Cloudflare DNS (1.1.1.1) often fixes this.

2. Configure Your Antivirus/Firewall
   Your security software (like Windows Defender) might be blocking the game. You need to add the game's .exe file as an exception or allowed application in its settings.

3. Adjust Your Router's Security Settings
   Advanced router features like AiProtection, NetShield, or QoS can sometimes block our services. Try temporarily disabling these features to see if it resolves the login issue.

4. Diagnose with a VPN
   As a test, try logging in while using a VPN service. If it works, it confirms the problem is with your local network (like your DNS or router settings), and you should revisit steps 1 and 3.