Fatal error: Uncaught Error: Undefined constant "PKP\security\authorization\internal\PKP_STRICT_MODE" in C:\xampp\htdocs\ojs\lib\pkp\classes\security\authorization\internal\ApiCsrfMiddleware.php:94 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\classes\security\authorization\internal\ApiCsrfMiddleware.php on line 94