S3 Credentials error

I am having an error when testing credentials to backup my NAS to Amazon S3. I keep receiving this error:

Error: <5>NOTICE: s3: s3 provider "" not known - please set correctly
<3>ERROR : : error listing: RequestError: send request failed
caused by: Get "https://s3.us-east-1.amazonaws.com/": dial tcp: lookup s3.us-east-1.amazonaws.com: no such host
Failed to lsjson with 2 errors: last error was: error in ListJSON: RequestError: send request failed
caused by: Get "https://s3.us-east-1.amazonaws.com/": dial tcp: lookup s3.us-east-1.amazonaws.com: no such host

I had originally not specified a region because the documentation said it auto determine the appropriate region if left blank. Please see my cred config in the attached screenshot.

I am coming from the world of Synology and had trouble finding comprehensive reference resources (lists of tunables and their options, configuring notifications, command syntax and formatting examples, etc.) so if there is a hidden treasure of education somewhere with detailed documentation and examples I would be grateful.