Users cannot login to Openshift 4 with error "Login failed (401 Unauthorized)" while a control plane node is failing

Solution Unverified - Updated 2025-06-11T11:08:45+00:00 -

Issue

When a control plane node went down login into the cluster is not possible with Login failed (401 Unauthorized).
There are oauth Pods in Pending status.
x509: certificate has expired or is not yet valid errors shown in the openshift-oauth-apiserver Pods logs.

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