Check version
Mods needed
apache2ctl -M | sort <= check mods => not installed mod_webdav => disable ! > a2ensite nextcloud.conf > a2enmod rewrite > a2enmod headers > a2enmod env > a2enmod dir > a2enmod mime > a2enmod php > a2enmod setenvif > a2enmod mod_fcgid > a2enmod ssl > systemctl restart apache2