Description of problem:

Error while opening particular ManagedClusterSet in ACM Web Console

Version-Release number of selected component (if applicable): 2.7.7

How reproducible: Always

Steps to Reproduce:

1. Re-create a ManagedClusterSet named prod using ACM UI

Additional info:

• Issue was not being for other ManagedClusterSet
• The issue was being faced because there was no "subjects" section in the ClusterRoleBinding.
• The affected ClusterRoleBindings were found by running:

~~~
oc get clusterrolebinding -o wide | grep open-cluster-management:managedclusterset | grep prod
~~~

• The issue was resolved after removing the clusterrolebinding