Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromisorInterface" not found in /srv/www/htdocs/moodle/lib/aws-sdk/src/S3/ObjectUploader.php:13 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/aws-sdk/src/S3/ObjectUploader.php on line 13