Trying to install LetsEncrypt on ubuntu 16 / apache with Discourse

Hi,

I’ve followed this same tutorial for my dropplet with Wordpress and no problem at all. Now, with Discourse i’m getting a weird error when i give this cmd:

sudo certbot --apache -d example.com

Error while running apache2ctl graceful.
httpd not running, trying to start
Action 'graceful' failed.
The Apache error log may have more information.

AH00112: Warning: DocumentRoot [/var/lib/letsencrypt/tls_sni_01_page/] does not exist
AH00112: Warning: DocumentRoot [/var/lib/letsencrypt/tls_sni_01_page/] does not exist
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:80
(98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
AH00015: Unable to open logs

Enabled Apache ssl module
Error while running apache2ctl graceful.
httpd not running, trying to start
Action 'graceful' failed.
The Apache error log may have more information.

Can anyone help me with this. I’m not a server / network guy, so this is like ET language for me.

Thank you in advanced.

Best Carlos