Fatal error: Uncaught Error: Class 'Cake\ORM\Entity' not found in /var/www/oksen_ryugakuse_kanri_sys/src/Model/Entity/BillSummary.php:36 Stack trace: #0 {main} thrown in /var/www/oksen_ryugakuse_kanri_sys/src/Model/Entity/BillSummary.php on line 36