Fatal error: Uncaught Error: Class "Aws\Crypto\MaterialsProvider" not found in /srv/www/htdocs/moodle/lib/aws-sdk/src/Crypto/KmsMaterialsProvider.php:16 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/aws-sdk/src/Crypto/KmsMaterialsProvider.php on line 16