Observe: Sometimes, any time you duplicate the certificate and critical within the Cloudflare dashboard and paste it into your related information over the server, blank traces are inserted. Nginx will deal with this kind of certificates and keys as invalid, so make sure that there are no blank lines https://lukasrssky.bloguetechno.com/5-tips-about-nginx-ssl-certificate-install-you-can-use-today-61995801