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