invalid character 'T' looking for beginning of value when executing an oc command

Issue

• oc adm prune images fails with

  invalid character 'T' looking for beginning of value
  

• oc get images output similar to

  invalid character 'T' looking for beginning of value
  

• verbose output similar to

  request.go:991] Response Body: This request caused apisever to panic. Look in log for details.
  helpers.go:119] error: couldn't get version/kind; json parse error: invalid character 'T' looking for beginning of value
  

• journalctl entries similar to

  atomic-openshift-master-api[108028]: panic(0x47b3580, 0xc42032ec80)