Thanks for the help, in reviewing /var/log/messages…i see only those 2 GET statements and don’t see any errors or other data. I was doing search online and did notice this issue with harbor tool here - docker 20.10 pull proxy cache image failed: Error response from daemon: missing or empty Content-Type header · Issue #13740 · goharbor/harbor · GitHub
Just sharing the link with hope it might help troubleshoot the issue.
I am trying to pull newrelic/synthetics-minion (docker.com)