Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromiseInterface' not found in /var/www/typo3/vendor/guzzlehttp/promises/src/RejectedPromise.php:11 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/guzzlehttp/promises/src/RejectedPromise.php on line 11