Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\BelongsToMany" not found in /var/www/html/casavio-qa2.das24.it/httpdocs/laravel/vendor/staudenmeir/laravel-adjacency-list/src/Eloquent/Relations/Graph/Descendants.php:18 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa2.das24.it/httpdocs/laravel/vendor/staudenmeir/laravel-adjacency-list/src/Eloquent/Relations/Graph/Descendants.php on line 18