Letsencrypt
From DWIKI
Free SSL certificates
Links
FAQ
Update cert(s)
certbot
Remove certs/domain
certbot delete --cert-name www.example.com
With and without www
certbot --apache -d example.com -d www.example.com
This website does not supply ownership information.
sod that
archive directory exists
Maybe you're using SNI, try
certbot --apache -d "www.example.com,example"