Fatal error: Uncaught Error: Interface "Psr\Http\Server\MiddlewareInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Classes/Middleware/ModifyResponse.php:19 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/nng/nnhelpers/Classes/Middleware/ModifyResponse.php on line 19