Fatal error: Uncaught Error: Interface "Illuminate\Contracts\Auth\Guard" not found in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/contracts/Auth/StatefulGuard.php:5 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/contracts/Auth/StatefulGuard.php on line 5