Fatal error: Uncaught Error: Interface "WapplerSystems\ZabbixClient\Operation\IOperation" not found in /var/www/html/cwtypo3/vendor/wapplersystems/zabbix_client/Classes/Operation/GetPHPVersion.php:21 Stack trace: #0 {main} thrown in /var/www/html/cwtypo3/vendor/wapplersystems/zabbix_client/Classes/Operation/GetPHPVersion.php on line 21