kube-storage-version-migrator has no priorityClassName set, but should as operand in openshift-* namespace.
Verified in latest 4.8.0-0.nightly-2021-04-28-005607 env:
$ oc get po -n openshift-kube-storage-version-migrator -o yaml | grep priorityClassName
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Moderate: OpenShift Container Platform 4.8.2 bug fix and security update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.