When users are trying to DuplicateClusterRoleBinding and Edit ClusterRoleBinding subject in RHOCP web console , getting below error :
" Error Loading : Name parameter invalid: "system%3Acontroller%3A<name-of-role-ref>": may not contain '%' "

Tested in OCP 4.12.18

Always

1. Open OpenShift web console
2. Select project : Openshift
3. Under User management -> Click Rolebindings
4. Look for any RoleBinding having Role Ref with format `system:<name>` 
5. At the end of that line, click on 3 dots where below options will be available :
- Duplicate ClusterRoleBinding
- Edit ClusterroleBinding subject
6. Select/click on any of the option

After selecting Duplicate ClusterRoleBinding or Edit ClusterroleBinding subject, getting below error :
Error Loading : Name parameter invalid: "system%3AXXX": may not contain '%'

After selecting Duplicate ClusterRoleBinding or Edit ClusterroleBinding subject, the correct/expected web page must be open.

When Duplicate or Edit RoleBinding `registry-registry-role` with Role Ref `system:registry` , it is working as expected.
When Duplicate or Edit RoleBinding `system:sdn-readers` with Role Ref `system:sdn-reader` , getting below error :
Error Loading : Name parameter invalid: "system%3Asdn-readers": may not contain '%'

Duplicate ClusterRoleBinding  or Edit ClusterRoleBindingBut subject working for few RoleBindings only (having Role ref system:<name>).

Screenshots are attached here : https://drive.google.com/drive/folders/1QHpdensG2gKx0tSv1zkF7Qiyert6eaSg?usp=sharing