Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromiseInterface' not found in /home/kubalos2/public_html/testtestowy/vendor/guzzlehttp/promises/src/Promise.php:9 Stack trace: #0 {main} thrown in /home/kubalos2/public_html/testtestowy/vendor/guzzlehttp/promises/src/Promise.php on line 9