I am writing code to upload files to AWS S3 and receiving this exception:

&gt; AmazonClientException: No RegionEndpoint or ServiceURL configured

My code:

    Console.WriteLine(&quot;ready to upload&quot;);
    AWSCredentials credentials;
    credentials = new BasicAWSCredentials(accessKeyID.Trim(), secretKey.Trim());
    AmazonS3Client s3Client = new AmazonS3Client(accessKeyID.Trim(), secretKey.Trim(), Amazon.RegionEndpoint.USEast1);
    Console.WriteLine(&quot;Successful verification&quot;);
    Console.WriteLine(&quot;Check if the bucket exists&quot;);
    if (!CheckBucketExists(s3Client, bucketName))
    {
        s3Client.PutBucket(bucketName);
        Console.WriteLine(&quot;create bucket&quot;);
    }
    TransferUtility utility = new TransferUtility();
    Console.WriteLine(&quot;Upload  Directory......&quot;);
    //exception here
    utility.UploadDirectory(@&quot;E:\telerikFile\13ginabdfglil.com&quot;, bucketName);

The exception:

    Amazon.Runtime.AmazonClientException: No RegionEndpoint or ServiceURL configured
      Amazon.Runtime.ClientConfig.Validate()
      Amazon.S3.AmazonS3Config.Validate()
      Amazon.Runtime.AmazonServiceClient..ctor(AWSCredentials credentials, ClientConfig config)
      Amazon.S3.AmazonS3Client..ctor()
      Amazon.S3.Transfer.TransferUtility..ctor()
      Telerik2Amazon.Program.UploadFile()

What should I do?

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No RegionEndpoint or ServiceURL configured