Fatal error: Uncaught Error: Interface "Psr\Http\Server\MiddlewareInterface" not found in /var/www/html/cwtypo3/vendor/wapplersystems/zabbix_client/Classes/Middleware/ZabbixClient.php:33 Stack trace: #0 {main} thrown in /var/www/html/cwtypo3/vendor/wapplersystems/zabbix_client/Classes/Middleware/ZabbixClient.php on line 33