Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Model" not found in /var/www/html/lib/pkp/classes/controlledVocab/ControlledVocab.php:27 Stack trace: #0 {main} thrown in /var/www/html/lib/pkp/classes/controlledVocab/ControlledVocab.php on line 27