Fatal error: Uncaught Error: Undefined constant "INDEX_FILE_LOCATION" in /home/jurnal.harapan.ac.id/public_html/lib/pkp/includes/bootstrap.inc.php:35 Stack trace: #0 /home/jurnal.harapan.ac.id/public_html/index.php(18): require() #1 {main} thrown in /home/jurnal.harapan.ac.id/public_html/lib/pkp/includes/bootstrap.inc.php on line 35