MyCloud S3 Backup, Access Denied from Amazon log

Hi guys,
I am trying to do an S3 backup for a MyCloud device. It’s set up and when I start it, it finishes quickly and reports it was successful. But the only thing in the AWS S3 bucket is the file /etc/S3log which has an Access Denied error.

I find no errors listed anywhere else so the problem is a guess for me. I am able to upload files using the AWS CLI and the same key/secret key in the .aws/credentials file. It ?must? be a permissions issue for the bucket but I can’t find the answer. Or could it be a My Cloud network protocol setting? Any help is appreciated. If people completed this with no problems, that would also be good to know. Thanks.

In fact a question: is anybody using the My Cloud S3 backup successfully?