OpenShift Console Operator fails to start with error "invalid flag: plugins-order, error: list must only contain currently enabled plugins" after upgrade to OpenShift 4.19

Issue

• During or after upgrading to OCP 4.19, the Console Operator fails to start.
• Console pods may enter a CrashLoopBackOff state.

• The following error appears in the console pod logs:

  F0818 21:09:37.781565       1 validate.go:76] invalid flag: plugins-order, error: list must only contain currently enabled plugins
  

• Users may also notice that the console-config ConfigMap contains plugins that are no longer installed in the cluster, especially if they were installed at some point in the past and then removed before the upgrade.