Looks like you maybe forgot to specify which domain you are trying to update with the -d flag ?
try
./certbot-auto register -d yourdomain.com --update-registration --email youremail@wherever.com
Looks like you maybe forgot to specify which domain you are trying to update with the -d flag ?
try
./certbot-auto register -d yourdomain.com --update-registration --email youremail@wherever.com