Fatal error: Uncaught Error: Call to undefined function WPO\IPS\as_schedule_recurring_action() in /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/Semaphore.php:365 Stack trace: #0 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/Semaphore.php(376): WPO\IPS\Semaphore::schedule_semaphore_cleanup() #1 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-includes/class-wp-hook.php(324): WPO\IPS\Semaphore::init_cleanup('') #2 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #4 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-settings.php(704): do_action('init') #5 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-config.php(105): require_once('/data01/virt111...') #6 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-load.php(50): require_once('/data01/virt111...') #7 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-blog-header.php(13): require_once('/data01/virt111...') #8 /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/index.php(17): require('/data01/virt111...') #9 {main} thrown in /data01/virt111751/domeenid/www.kuuseaiand.ee/htdocs/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/Semaphore.php on line 365