Fatal error: Uncaught Error: Interface "Laminas\HttpHandlerRunner\Emitter\EmitterInterface" not found in /opt/lampp/htdocs/forum/flarum/vendor/laminas/laminas-httphandlerrunner/src/Emitter/EmitterStack.php:22 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/laminas/laminas-httphandlerrunner/src/Emitter/EmitterStack.php on line 22