Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromiseInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/guzzlehttp/promises/src/RejectedPromise.php:10 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/guzzlehttp/promises/src/RejectedPromise.php on line 10