Fatal error: Uncaught Error: Class 'GuzzleHttp\Event\AbstractEvent' not found in /home/szperaczxf/storage_diagnostik/vendor/guzzlehttp/guzzle/src/Event/AbstractRequestEvent.php:11 Stack trace: #0 {main} thrown in /home/szperaczxf/storage_diagnostik/vendor/guzzlehttp/guzzle/src/Event/AbstractRequestEvent.php on line 11