Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Database\Eloquent\Castable" not found in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/database/Eloquent/Casts/AsCollection.php:9 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/database/Eloquent/Casts/AsCollection.php on line 9