During an upgrade to an OpenShift 4.19.7+ version with an invalid logging-view-plugin ConsolePlugin, the console pods will end up crash looping and the upgrade may not complete. 

oc get pods -n openshift-console -l component=ui
NAME                       READY   STATUS             RESTARTS          AGE
console-5bf56fd8ff-qxfwn   0/1     CrashLoopBackOff   303 (4m20s ago)   25h
console-5bf56fd8ff-sv46m   0/1     CrashLoopBackOff   302 (70s ago)     25h
console-856988748c-zn7cw   1/1     Running            0                 26h

The following errors are seen in the console-operator pod. 

oc logs console-operator-78445c68b5-jgkbn -n openshift-console-operator
E1110 05:44:09.300350       1 configmap.go:189] unknown backend type for "logging-view-plugin" plugin: "". Currently only "Service" backend type is supported.
E1110 05:44:09.300377       1 configmap.go:210] unknown proxy service type for "logging-view-plugin" plugin: "". Currently only "Service" proxy endpoint type is supported.

OpenShift Container Platform 4.19, and I believe it will be 4.19.7+.

I am able to reproduce this issue.    

Steps included in comment below. 

The console pod is crashing and the errors are seen in the console operator pod.

The console pod doesn't crash and no errors are seen in the console operator pod.