Fatal error: Uncaught Error: Interface "Franzl\Middleware\Whoops\Formats\Format" not found in /opt/lampp/htdocs/forum/flarum/vendor/franzl/whoops-middleware/src/Formats/Xml.php:8 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/franzl/whoops-middleware/src/Formats/Xml.php on line 8