Aws\S3\Exception\S3Exception thrown

Error executing "ListObjects" on "https://theplaidhorse.s3.us-east-2.amazonaws.com/?delimiter=%2F&prefix=media%2Fuploads%2Fwpcf7_uploads%2F&encoding-type=url"; AWS HTTP error: cURL error 6: Could not resolve host: theplaidhorse.s3.us-east-2.amazonaws.com (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)