Degraded network cluster operator reports "failed to generate kube-proxy configuration file: unused arguments: master" in Red Hat OpenShift Container Platform 4.x

Issue

Degraded network cluster operator reports "failed to generate kube-proxy configuration file: unused arguments: master" in Red Hat OpenShift Container Platform 4.x

$ oc get co
NAME                                       VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE
authentication                             4.6.9     True        False         False      34m
cloud-credential                           4.6.9     True        False         False      3h17m
cluster-autoscaler                         4.6.9     True        False         False      3h11m
config-operator                            4.6.9     True        False         False      3h13m
console                                    4.6.9     True        False         False      69m
csi-snapshot-controller                    4.6.9     True        False         False      72m
dns                                        4.6.9     True        False         False      3h11m
etcd                                       4.6.9     True        False         False      3h11m
image-registry                             4.6.9     True        False         False      73m
ingress                                    4.6.9     True        False         False      56m
insights                                   4.6.9     True        False         False      3h13m
kube-apiserver                             4.6.9     True        False         False      3h10m
kube-controller-manager                    4.6.9     True        False         False      3h10m
kube-scheduler                             4.6.9     True        False         False      3h10m
kube-storage-version-migrator              4.6.9     True        False         False      33m
machine-api                                4.6.9     True        False         False      3h7m
machine-approver                           4.6.9     True        False         False      3h12m
machine-config                             4.6.9     True        False         False      67m
marketplace                                4.6.9     True        False         False      68m
monitoring                                 4.6.9     True        False         False      33m
network                                    4.6.9     True        False         True       3h13m
node-tuning                                4.6.9     True        False         False      3h13m
openshift-apiserver                        4.6.9     True        False         False      90m
openshift-controller-manager               4.6.9     True        False         False      3h11m
openshift-samples                          4.6.9     True        False         False      3h9m
operator-lifecycle-manager                 4.6.9     True        False         False      3h12m
operator-lifecycle-manager-catalog         4.6.9     True        False         False      3h12m
operator-lifecycle-manager-packageserver   4.6.9     True        False         False      69m
service-ca                                 4.6.9     True        False         False      3h13m
storage                                    4.6.9     True        False         False      72m
$ oc describe co network | grep Conditions: -A5
  Conditions:
    Last Transition Time:  2021-01-18T18:19:55Z
    Message:               Internal error while rendering operator configuration: failed to generate kube-proxy configuration file: unused arguments: master
    Reason:                RenderError
    Status:                True
    Type:                  Degraded