Server Security Update Breaks Cron
Can you ask your host about raising php's memory_limit setting to at least 128MB. 32MB is below the current recommended minimum for CiviCRM of 256MB (see https://docs.civicrm.org/sysadmin/en/latest/requirements/#php-configuration), and the absolute minimum value used in the configuration file that calls ini_set() is currently 128MB (see https://github.com/civicrm/civicrm-core/blob/5.17.0/templates/CRM/common/civicrm.settings.php.template#L540)