Fatal error: Uncaught Error: Undefined constant "PKP\submission\action\PKP_STRICT_MODE" in C:\xampp\htdocs\ojs\lib\pkp\classes\submission\action\EditorAction.php:279 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\classes\submission\action\EditorAction.php on line 279