What to do when encountering "manifest unknown error: unable to retrieve source image " while using oc-mirror?

Solution Verified - Updated -

Issue

While mirroring operator catalogs with oc-mirror plugin, one might encounter the following errors :

$ oc mirror --config=imageset-config.yaml file:///largefs-dir 
 error: unable to retrieve source image registry.redhat.io/compliance/openshift-selinuxd-rhel8 manifest sha256:568d5b06ebeb54770d5edf7407f2e6e34f8e0fa58a412e19a27124ed496b18d5: manifest unknown: manifest unknown
  error: unable to retrieve source image

Environment

OCP v4.11+

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