Fatal error: Uncaught Error: Interface "Aws\Crypto\MaterialsProviderInterface" not found in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\aws\aws-sdk-php\src\Crypto\MaterialsProvider.php:4 Stack trace: #0 {main} thrown in C:\Servers\htdocs\inventory.fitzalan.co.uk\vendor\aws\aws-sdk-php\src\Crypto\MaterialsProvider.php on line 4