Fatal error: Uncaught Error: Call to undefined function wc_get_order_statuses() in /var/www/shop/wp-content/plugins/sip-advanced-email-notification-woocommerce/admin/inc/add-action.php:5 Stack trace: #0 /var/www/shop/wp-includes/class-wp-hook.php(286): check_woocommerce_order_status('') #1 /var/www/shop/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /var/www/shop/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /var/www/shop/wp-settings.php(450): do_action('init') #4 /var/www/shop/wp-config.php(95): require_once('/var/www/shop/w...') #5 /var/www/shop/wp-load.php(37): require_once('/var/www/shop/w...') #6 /var/www/shop/wp-blog-header.php(13): require_once('/var/www/shop/w...') #7 /var/www/shop/index.php(17): require('/var/www/shop/w...') #8 {main} thrown in /var/www/shop/wp-content/plugins/sip-advanced-email-notification-woocommerce/admin/inc/add-action.php on line 5