Fatal error: Uncaught Error: Interface 'GuzzleHttp\Promise\PromisorInterface' not found in /mnt/volume_lon1_01/backend/admin/vendor/guzzlehttp/guzzle/src/Pool.php:20 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/guzzlehttp/guzzle/src/Pool.php on line 20