Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in /opt/lampp/htdocs/vendor/guzzlehttp/promises/src/EachPromise.php:9 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/vendor/guzzlehttp/promises/src/EachPromise.php on line 9