Fatal error: Uncaught Error: Class "Flarum\Api\Serializer\AbstractSerializer" not found in /home/magjistraturaedu/public_html/forum.magjistratura.edu.al/vendor/flarum/flags/src/Api/Serializer/FlagSerializer.php:18 Stack trace: #0 {main} thrown in /home/magjistraturaedu/public_html/forum.magjistratura.edu.al/vendor/flarum/flags/src/Api/Serializer/FlagSerializer.php on line 18