Fatal error: Trait "Staudenmeir\LaravelAdjacencyList\Eloquent\Relations\Traits\Concatenation\IsConcatenableRelation" not found in /home/llbmvgik/public_html/vendor/staudenmeir/laravel-adjacency-list/src/Eloquent/Relations/Traits/Concatenation/IsConcatenableDescendantsRelation.php on line 9