Fatal error: Uncaught Error: Class "PKP\components\forms\Field" not found in /home/aake8592/subdomains/jurnal.aakpekalongan.ac.id/lib/pkp/classes/components/forms/FieldColor.inc.php:15
Stack trace:
#0 {main}
thrown in /home/aake8592/subdomains/jurnal.aakpekalongan.ac.id/lib/pkp/classes/components/forms/FieldColor.inc.php on line 15