Fatal error: Uncaught Error: Interface "Psr\Http\Server\RequestHandlerInterface" not found in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Api/Controller/SendTestMailController.php:23 Stack trace: #0 {main} thrown in /home/sardosne/flarum.sardos.net/vendor/flarum/core/src/Api/Controller/SendTestMailController.php on line 23