Why Splunk_TA_aws throwing StackTrace making generic S3 connection

[tkw03]

Creating the generic S3 connection I get this in logs:

"/opt/splunk/etc/apps/Splunk_TA_aws/bin/splunk_ta_aws/modinputs/generic_s3/aws_s3_common.py", line 63, in _create_s3_connection
    if isinstance(conn.host, unicode):
AttributeError: 'NoneType' object has no attribute 'host'

Any idea why I am getting this?
Heres my inputs:

[aws_s3://somename_S3]
start_by_shell = false
aws_account = XXXXXXXXXXXXXX
sourcetype = aws:s3
initial_scan_datetime = default
max_items = 100000
max_retries = 3
polling_interval =
interval = 30
recursion_depth = -1
character_set = auto
is_secure = True
host_name = s3-website-us-gov-west-1.amazonaws.com
index = aws_s3
aws_iam_role = XXXXXXXXXXXXXX
bucket_name = XXXXXXXXXXXXXX