Fatal error: Uncaught Error: Class 'GuzzleHttp\Promise\RejectionException' not found in /opt/lampp/htdocs/vendor/guzzlehttp/promises/src/AggregateException.php:8 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/vendor/guzzlehttp/promises/src/AggregateException.php on line 8