Fatal error: Uncaught Error: Class 'Illuminate\Database\Eloquent\Relations\Relation' not found in /home/edmedu/www/edmuhak.com/dev.bak/vendor/kalnoy/nestedset/src/BaseRelation.php:12 Stack trace: #0 {main} thrown in /home/edmedu/www/edmuhak.com/dev.bak/vendor/kalnoy/nestedset/src/BaseRelation.php on line 12