This error occurs when the game client attempts to connect to a secure internet server but cannot verify the validity of the user's license (CD Key) with the authentication server.
: If the issue persists, try resetting your network configuration by running netsh winsock reset in an Administrator Command Prompt and restarting your PC. Temporary Workaround for Singleplayer This error occurs when the game client attempts
If you are seeing this error today, it usually means your Steam client is offline, the game files are corrupted, or the server you are trying to join is running an outdated or incompatible authentication protocol. the game files are corrupted