Fatal error: Uncaught Error: Non-static method PKPApplication::defineExposedConstant() cannot be called statically in H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\classes\core\PKPApplication.inc.php:545 Stack trace: #0 H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\classes\core\PKPApplication.inc.php(17): define_exposed() #1 H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\includes\functions.inc.php(28): include_once('H:\\root\\home\\ib...') #2 H:\root\home\ibrahimalbaltah-001\www\ojs\classes\core\Application.inc.php(19): import() #3 H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\includes\functions.inc.php(28): include_once('H:\\root\\home\\ib...') #4 H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\includes\bootstrap.inc.php(55): import() #5 H:\root\home\ibrahimalbaltah-001\www\ojs\index.php(60): require('H:\\root\\home\\ib...') #6 {main} thrown in H:\root\home\ibrahimalbaltah-001\www\ojs\lib\pkp\classes\core\PKPApplication.inc.php on line 545