Fatal error: Uncaught Error: Interface "Psr\Http\Message\UriInterface" not found in /var/www/html/vendor/guzzlehttp/psr7/src/Uri.php:17 Stack trace: #0 /var/www/html/vendor/composer/ClassLoader.php(576): include() #1 /var/www/html/vendor/composer/ClassLoader.php(427): Composer\Autoload\{closure}() #2 /var/www/html/vendor/guzzlehttp/psr7/src/Utils.php(472): Composer\Autoload\ClassLoader->loadClass() #3 /var/www/html/vendor/aws/aws-sdk-php/src/Api/Serializer/RestSerializer.php(53): GuzzleHttp\Psr7\Utils::uriFor() #4 /var/www/html/vendor/aws/aws-sdk-php/src/Api/Serializer/RestXmlSerializer.php(25): Aws\Api\Serializer\RestSerializer->__construct() #5 /var/www/html/vendor/aws/aws-sdk-php/src/Api/Service.php(101): Aws\Api\Serializer\RestXmlSerializer->__construct() #6 /var/www/html/vendor/aws/aws-sdk-php/src/ClientResolver.php(1133): Aws\Api\Service::createSerializer() #7 /var/www/html/vendor/aws/aws-sdk-php/src/ClientResolver.php(431): Aws\ClientResolver::_default_serializer() #8 /var/www/html/vendor/aws/aws-sdk-php/src/AwsClient.php(249): Aws\ClientResolver->resolve() #9 /var/www/html/vendor/aws/aws-sdk-php/src/S3/S3Client.php(439): Aws\AwsClient->__construct() #10 /var/www/html/vendor/aws/aws-sdk-php/src/AwsClient.php(809): Aws\S3\S3Client->__construct() #11 /var/www/html/docs/index.php(145): Aws\AwsClient::factory() #12 {main} thrown in /var/www/html/vendor/guzzlehttp/psr7/src/Uri.php on line 17