During the oc mirror from a tar to the quay registry the customer is encountering the below error
~~~~
[Worker] error mirroring image quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:0068972abd6f7832be48228f1667187e654d1800a907665b42ad25fb98adf936 error: initializing source docker://localhost:55000/openshift/release:4.19.2-x86_64-csi-driver-nfs: reading manifest 4.19.2-x86_64-csi-driver-nfs in localhost:55000/openshift/release: manifest unknown
~~~

The mirroring to disk worked with out errors.

The imageset they are using
~~~
kind: ImageSetConfiguration
apiVersion: mirror.openshift.io/v2alpha1
mirror:
platform:
channels:

• name: stable-4.19
  minVersion: 4.19.2
  maxVersion: 4.19.2
  full: true
  graph: true
  operators:
• catalog: registry.redhat.io/redhat/redhat-operator-index:v4.19
  packages:
• name: kubevirt-hyperconverged
• name: migration-toolkit-for-virtualization-operator
• name: kubernetes-nmstate-operator
• name: node-healthcheck-operator
• name: fence-agents-remediation-operator
• name: kube-descheduler-operator
• name: node-maintenance-operator
• name: aws-load-balancer-operator
• name: 3scale-operator
• name: node-observability-operator
  additionalImages:
• name: registry.redhat.io/ubi8/ubi:latest
• name: registry.redhat.io/ubi9/ubi@sha256:20f695d2a91352d4eaa25107535126727b5945bff38ed36a3e59590f495046f0
  ~~~

The command they are using
~~~
oc mirror -c ImageSetConfiguration --from file:///home/base-image-smaller/ docker://<quay registry url>:8443 --v2 – dest-skip-tls -p 8443 -authfile config.json
~~~

disk to mirror works on a machine connected to the internet but not on an isolated machine.