On a Plesk Obsidian server, WordPress Toolkit was updated to version 5.3.
WordPress instances installed on domains with PHP 5.3 or lower are not manageable in Domains > example.com > WordPress and the warning is shown:
PHP version 5.3.26 is not supported. PHP version used by this site has reached End Of Life and is not supported by PHP team and WordPress Toolkit anymore. Using outdated PHP versions poses a security risk for your website. Switch to a newer PHP version to ensure the security of your site and to manage it via WordPress Toolkit. Note: WordPress Toolkit cannot retrieve any information about this site due to unsupported PHP version.
Starting from WordPress Toolkit v.5.3 PHP versions 5.3 and lower are not supported anymore.
Go to WordPress Toolkit and select PHP version 7.0 or higher from a drop-down under error message:
Note: WordPress version 3.6 and above are compatible with PHP 7.0, update the WordPress installation if necessary.