Earlier quoted context omitted.
The issues with timeouts can be avoided if you use the command line upgrader: % php /var/www/nextcloud/updater/updater.phar
Yea, it didn't work as expected sudo -u nginx php updater/updater.phar Nextcloud Updater - version: v18.0.9-8-g27dac77 Current version is 18.0.14. PHP Fatal error: Uncaught Error: Call to undefined function NC\Updater\curl_init() in phar:///home/owncloud/updater/updater.phar/lib/Updater.php:455 Stack trace: #0 phar:///home/owncloud/updater/updater.phar/lib/Updater.php(119): NC\Updater\Updater->getUpdateServerResponse…
[1]: https://docs.nextcloud.com/server/21/admin_manual/installati...