Edit File: ActionScheduler_NullSchedule.php
<?php /** * Class ActionScheduler_NullSchedule */ class ActionScheduler_NullSchedule extends ActionScheduler_SimpleSchedule { /** * Make the $date param optional and default to null. * * @param null $date The date & time to run the action. */ public function __construct( DateTime $date = null ) { $this->scheduled_date = null; } /** * This schedule has no scheduled DateTime, so we need to override the parent __sleep() * @return array */ public function __sleep() { return array(); } public function __wakeup() { $this->scheduled_date = null; } }