Fatal error: Uncaught Error: Interface "Flarum\Foundation\AppInterface" not found in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Install/Installer.php:22 Stack trace: #0 {main} thrown in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Install/Installer.php on line 22