Fatal error: Uncaught Error: Class "Aws\Signature\SignatureV4" not found in /home/sourceex/public_html/pm/vendor/aws/aws-sdk-php/src/Signature/S3SignatureV4.php:20 Stack trace: #0 {main} thrown in /home/sourceex/public_html/pm/vendor/aws/aws-sdk-php/src/Signature/S3SignatureV4.php on line 20