Fatal error: Uncaught Error: Interface "IWPML_Frontend_Action" not found in /usr/local/www/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/Hooks/Sync.php:7 Stack trace: #0 {main} thrown in /usr/local/www/wordpress/wp-content/plugins/wpml-string-translation/classes/MO/Hooks/Sync.php on line 7