Nextcloud 16 Security Scan: __Host-Prefix

There is no nextcloud.conf file on my server. Here is my Apache2 configuration:

<VirtualHost nextcloud.domain.com:443>

     ServerAdmin user@domain.com
     DocumentRoot /var/www/nextcloud
     ServerName nextcloud.domain.com
    
     <Directory /var/www/nextcloud>
        Options +FollowSymlinks
        AllowOverride All
        Require all granted
          <IfModule mod_dav.c>
            Dav off
          </IfModule>
        SetEnv HOME /var/www/nextcloud
        SetEnv HTTP_HOME /var/www/nextcloud
     </Directory>

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

</VirtualHost>