Fatal error: Uncaught Error: Class "Aws\Signature\S3SignatureV4" not found in /Applications/MAMP/htdocs/Native/vendor/aws/aws-sdk-php/src/Signature/S3ExpressSignature.php:9 Stack trace: #0 {main} thrown in /Applications/MAMP/htdocs/Native/vendor/aws/aws-sdk-php/src/Signature/S3ExpressSignature.php on line 9