Certbot lets-encrypt certificate not found after i

Question

Certbot installed two lets-encrypt SSL certificates but none working

On my AWS EC2 Ubuntu 18

Three files are as follows:

/etc/apache2/sites-available/000-default.conf

<VirtualHost *:80>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined

RewriteEngine on
RewriteCond %{SERVER_NAME} =sub1.domain.net [OR]
RewriteCond %{SERVER_NAME} =sub2.domain.net
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>

/etc/apache2/sites-available/000-default-le-ssl.conf

<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerAdmin webmaster@localhost
DocumentRoot /var/www/html
SSLEngine on

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined

ServerName sub1.domain.net
Include /etc/letsencrypt/options-ssl-apache.conf
ServerAlias sub2.domain.net
SSLCertificateFile /etc/letsencrypt/live/sub1.domain.net/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/sub2.domain.net/privkey.pem
</VirtualHost>
</IfModule>

/etc/apache2/sites-available/default-ssl.conf

<IfModule mod_ssl.c>
<VirtualHost _default_:443>
ServerAdmin webmaster@localhost

DocumentRoot /var/www/html

ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined

SSLEngine on


SSLCertificateFile      /etc/ssl/certs/ssl-cert-snakeoil.pem
SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key


<FilesMatch "\.(cgi|shtml|phtml|php)$">
SSLOptions +StdEnvVars
</FilesMatch>
<Directory /usr/lib/cgi-bin>
SSLOptions +StdEnvVars
</Directory>
</VirtualHost>
</IfModule>

 # vim: syntax=apache ts=4 sw=4 sts=4 sr noet

/var/log/letsencrypt/letsencrypt.log

2018-12-21 04:51:46,545:DEBUG:certbot.reverter:Creating backup of /etc/apache2/sites-enabled/000-default-le-ssl.conf
2018-12-21 04:51:46,744:INFO:certbot_apache.configurator:Deploying Certificate to VirtualHost /etc/apache2/sites-enabled/000-default-le-ssl.conf

netstat -ltnp | grep ':80\|:443'

tcp6 0 0 :::443 :::* LISTEN      1529/apache2
tcp6 0 0 :::80 :::* LISTEN      1529/apache2

I tried everything but the outside world doesn't find any certificate. I didn't put any entry into this file: /etc/apache2/apache2.conf

subdomains were taken from free DNS dynu dot com