If you receive This site can’t provide a secure connection, ERR_SSL_PROTOCOL_ERROR message when using Google Chrome on Windows 10, see this post.

SSL is a security protocol used to encrypt data transmitted between a website and a user’s web browser so that third parties cannot intercept the information.

Check if ERR_BAD_SSL_CLIENT_AUTH_CERT error still occurs. After following the solutions mentioned, you will successfully fix Google Chrome ERR_BAD_SSL_CLIENT_AUTH_CERT error in Windows 10.