changelog/10.12.0_2023-02-24/40394
Change: Drop PHP 7.3 support across the platform
Support for security fixes for PHP 7.3 ended in Dec 2021
ownCloud core no longer supports PHP 7.3.
Ensure that you are using PHP 7.4.
https://github.com/owncloud/core/pull/40394
https://www.php.net/supported-versions.php