certbot certonly --standalone -d srvjpvoipissabell.ddns.net
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Requesting a certificate for srvjpvoipissabell.ddns.net
Performing the following challenges:
http-01 challenge for srvjpvoipissabell.ddns.net
Cleaning up challenges
Problem binding to port 80: Could not bind to IPv4 or IPv6.
HELP!!!!!!!!!