Fatal error: Uncaught Error: Class "Laminas\Diactoros\Response" not found in /opt/lampp/htdocs/forum/flarum/vendor/laminas/laminas-diactoros/src/Response/HtmlResponse.php:24 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/laminas/laminas-diactoros/src/Response/HtmlResponse.php on line 24