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If you receive the error “Failed to connect to the server”, it means the loader cannot establish a secure connection to the Proofcore servers.

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Connection Troubleshooting

Please follow these steps to resolve network or file integrity issues:
1

Verify Loader Version

Ensure you are using the latest version of the loader. If you have an old file saved, delete it and download the most recent version from the Downloads section of the website.
2

Check Firewall and VPN

Network blocks are the most common cause of this error.
  • Firewall: Ensure the loader is not being blocked by your Windows Firewall or any third-party firewall software.
  • VPN: If you are using a VPN, try disabling it temporarily, as some VPN providers block necessary ports.
3

Restart Network Hardware

Restarting your network components can resolve temporary IP or routing issues.
  • Restart your PC.
  • Restart your modem/router. Unplug the power for 60 seconds before plugging it back in.
4

Check for Downtime

The server may be temporarily offline for maintenance or an update.
  • Check the Proofcore Discord #announcements channel to see if there are currently any scheduled or unexpected downtimes.