Private Sites Not Loading & Deletion Errors After Upgrade to Alfresco Community Edition 23.4.1

[mxc]

Environment

• Alfresco Content Repository (ACS): Upgraded from 7.4 to 23.4.1
• Alfresco Share: Upgraded from 23.1.0 to 23.4.0
• Deployment Method: Docker Compose
• Search Engine: SOLR (reindexed, but issue persists)

Description of the Issue

After upgrading my Alfresco instance, I encountered issues related to PRIVATE sites:

• PRIVATE Sites Do Not Load:
• I can log in to Share and access MODERATED sites without issues.
• However, attempting to access PRIVATE sites results in an HTTP 410 error in the JavaScript console.
• The following request fails with a 410 Gone response:
  share/proxy/alfresco/slingshot/doclib/doclist/documents/site/abc/documentLibrary?max=50&filter=recentlyModifiedByMe
• The default error page for Share is displayed.
• I am the creator of these sites

Impact on Other Users:

• Other users can initially access PRIVATE sites.
• However, after ~7 days, they report that the Document Library begins to display an empty page for documents.
• Other parts of the site (menus, etc.) remain accessible.

New PRIVATE Sites Also Fail:

• I created a new PRIVATE site to test.
• The site was created successfully but resulted in the same 410 error when accessed.
• However, I can create and access MODERATED sites without issue.

Workaround - Changing Site Visibility:

• Using the API, I changed an existing PRIVATE site to MODERATED.
• The site then worked normally.

Deletion Errors:

• Attempting to delete the PRIVATE or MODERATED test sites (created during troubleshooting) fails in both Share and the API.
  DELETE /alfresco/api/-default-/public/alfresco/versions/1/sites/test-site?permanent=false

{
  "error": {
    "errorKey": "framework.exception.ApiDefault",
    "statusCode": 401,
    "briefSummary": "01160056 Authentication failed for Web Script org/alfresco/api/ResourceWebScript.delete",
    "stackTrace": "For security reasons the stack trace is no longer displayed, but the property is kept for previous versions",
    "descriptionURL": "https://api-explorer.alfresco.com",
    "logId": "3adaa110-7f89-47ac-9aa1-107f89a7acf0"
  }
}

• This occurs even though I am the creator of the sites and logged in with the same user credentials.

Troubleshooting Steps Taken

• Reindexed SOLR → No effect.
• Created new PRIVATE sites → Same issue occurs.
• Changed PRIVATE sites to MODERATED → Sites work normally.
• Attempted deletion via API and Share → Authentication error (401).

Expected Behavior

• PRIVATE sites should be accessible without errors.
• Site deletion should work as expected.

Request for Assistance

• Is there a known issue with PRIVATE site permissions in Alfresco 23.x? I have searched but didn't find any similar reports.
• Are there additional configuration changes required after upgrading?
• Any workarounds or fixes available for site deletion errors?