Fatal error: Uncaught Error: Class "Aws\Multipart\AbstractUploader" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\aws\aws-sdk-php\src\Glacier\MultipartUploader.php:16 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\aws\aws-sdk-php\src\Glacier\MultipartUploader.php on line 16