Fatal error: Uncaught Error: Class "Aws\S3\MultipartUploader" not found in /home/alotaishan/public_html/ots001/vendor/aws/aws-sdk-php/src/S3/Crypto/S3EncryptionMultipartUploader.php:20 Stack trace: #0 {main} thrown in /home/alotaishan/public_html/ots001/vendor/aws/aws-sdk-php/src/S3/Crypto/S3EncryptionMultipartUploader.php on line 20