After certbot certificate install: zabbix site not available

[M4rtin]

Hallo, I tried to install a let's encrypt certificate to my zabbix server and - unfortunately - didn't made a backup before. Now the site is not available with http and https anymore.

I removed certbot and default-ssl.conf


Apache is running:

apache2.service - The Apache HTTP Server
Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2023-07-03 09:25:57 UTC; 21min ago
Docs: https://httpd.apache.org/docs/2.4/
Process: 836 ExecStart=/usr/sbin/apachectl start (code=exited, status=0/SUCCESS)
Process: 2023 ExecReload=/usr/sbin/apachectl graceful (code=exited, status=0/SUCCESS)
Main PID: 909 (apache2)
Tasks: 7 (limit: 2252)
Memory: 30.8M
CGroup: /system.slice/apache2.service
├─ 909 /usr/sbin/apache2 -k start
├─2076 /usr/sbin/apache2 -k start
├─2077 /usr/sbin/apache2 -k start
├─2078 /usr/sbin/apache2 -k start
├─2079 /usr/sbin/apache2 -k start
├─2080 /usr/sbin/apache2 -k start
└─2372 /usr/sbin/apache2 -k start

/etc/apache/site-available/myserver.conf:

NameVirtualHost *:80
<VirtualHost *:80>
DocumentRoot /usr/share/zabbix
ServerName zabbix.xxx.net
RewriteEngine on
RewriteCond %{SERVER_NAME} =zabbix.xxx.net
RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>

apache log:

AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/apache2/sites-enabled/zabbix.xxx.net.conf:1
AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using xx.xx.xx.xx. Set the 'ServerName' directive globally to suppress this message
Syntax OK

port 80:

root@zabbix:/etc/apache2/sites-available# sudo netstat -anp | grep :80
tcp6 0 0 :::80 :::* LISTEN 909/apache2

owner of /usr/share/zabbix is www-data:www-data

I also tried a2dissite zabbix.conf / a2ensite zabbix.conf

Do you know how I can get the site available again?