The SSLSSL Secure Socket Layer - Encryption from the server to the browser and back. Prevents prying eyes from seeing what you are sending between your browser and the server. certificate for “wp.org” is set to be the same one as the cert for “w.org”. Presumably this is because they’re both pointing to the same place which is doing the redirection, but the incorrect domain on the certificate causes an error.
So, wp.org needs a new SSL certificate set up on it.