Fatal error: Uncaught Error: Class 'Aws\Signature\SignatureV4' not found in /home/xcddwtvp/public_html/aws-sdk-php/Aws/Signature/S3SignatureV4.php:13 Stack trace: #0 {main} thrown in /home/xcddwtvp/public_html/aws-sdk-php/Aws/Signature/S3SignatureV4.php on line 13