Fatal error: Uncaught Error: Class 'Illuminate\Database\Eloquent\Relations\Relation' not found in /var/www/html/ow-api-v2/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php:13 Stack trace: #0 {main} thrown in /var/www/html/ow-api-v2/vendor/illuminate/database/Eloquent/Relations/BelongsToMany.php on line 13