Fatal error: Uncaught Error: Class "Flarum\Http\Controller\AbstractHtmlController" not found in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Install/Controller/IndexController.php:18 Stack trace: #0 {main} thrown in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Install/Controller/IndexController.php on line 18