This is for the error that reads Corrupted Message (3) when entering your key.

Most of the time, this error message is triggered by the loader having issues communicating with our Authentication servers. The following steps should help to eliminate it:

• Use a VPN (ProtonVPN is free) - This may be required for some people because of your firewall, or your ISP blocking the connection.
• Use the latest loader
• Use a different network