Can't set a RBAC policy on "creation of ApplicationSet in a specific AppProject"

[behniafb]

Checklist:

• I've searched in the docs and FAQ for my answer: https://bit.ly/argocd-faq.
• I've included steps to reproduce the bug.
• I've pasted the output of argocd version.

Describe the bug
What I have now:

1. An AppProject called platform which it's config is as below:

---
apiVersion: argoproj.io/v1alpha1
kind: AppProject
metadata:
  name: platform
spec:
  description: DevOps team deployments (Including Cluster admins)
  sourceRepos:
    - https://git.behnia.com/devops/*
  sourceNamespaces:
    - platform*
  destinations:
    - namespace: platform*
      server: https://kubernetes.default.svc
  clusterResourceWhitelist:
    - group: '*'
      kind: '*'
  namespaceResourceWhitelist:
    - group: '*'
      kind: '*'
  roles:
    - name: admins
      description:  Platform Admin role
      policies:
        - p, proj:platform:admins, applications, create, platform/*, allow
        - p, proj:platform:admins, applications, delete, platform/*, allow
        - p, proj:platform:admins, applications, get, platform/*, allow
        - p, proj:platform:admins, applications, override, platform/*, allow
        - p, proj:platform:admins, applications, sync, platform/*, allow
        - p, proj:platform:admins, applications, update, platform/*, allow
        - p, proj:platform:admins, applications, action/*, platform/*, allow
      
        - p, proj:platform:admins, applicationsets, get, platform/*, allow
        - p, proj:platform:admins, applicationsets, create, platform/*, allow
        - p, proj:platform:admins, applicationsets, update, platform/*, allow
        - p, proj:platform:admins, applicationsets, delete, platform/*, allow
   
        - p, proj:platform:admins, logs, get, platform/*, allow
        - p, proj:platform:admins, exec, create, platform/*, allow
        
        - p, proj:platform:admins, projects, get, platform, allow
        
        - p, proj:platform:admins, repositories, get, platform/*, allow
        - p, proj:platform:admins, repositories, create, platform/*, allow
        - p, proj:platform:admins, repositories, update, platform/*, allow
        - p, proj:platform:admins, repositories, delete, platform/*, allow
      groups:
        - person1
        - person2
        - behnia.f
    - name: platform-readonly
      description: Platform Readonly role
      policies:
        - p, proj:platform:readonly, applications, get, platform/*, allow
        - p, proj:platform:readonly, logs, get, platform/*, allow
        - p, proj:platform:readonly, repositories, get, platform/*, allow
      groups:
        - person3
        - person4
    - name: platform-edit
      description: Edit role for platform 
      policies:
        - p, proj:platform:platform-edit, applications, get, platform/*, allow
        - p, proj:platform:platform-edit, applications, sync, platform/*, allow
        - p, proj:platform:platform-edit, applications, actions/*, platform/*, allow
        - p, proj:platform:platform-edit, logs, get, platform/*, allow
        - p, proj:platform:platform-edit, repositories, get, platform/*, allow

Now I want to add a new policy, for admins to be able to edit their project (which is platform).
So I guess this should be the policy:

p, proj:platform:admins, projects, update, platform, allow

But when I apply this new config & try to update the platform project, it gives me this error on the UI:

Unable to edit project: invalid policy rule 'p, proj:platform:admins, applicationsets, get, platform/*, allow': project resource must be: 'applications', 'repositories' or 'clusters', not 'applicationsets'

To Reproduce
I've put the reproduce steps above.

Expected behavior
Be able to edit the platform project. Also, why I get an error which is related to something else from what I edited?! (I added a new policy for project, and the error is for applicationsets !)

Version

2.10.6