Problem
Error: The application was unable to serve your request: com.atlassian.confluence.rpc.RemoteException: You're not allowed to view that page, or it does not exist.
Solution
Then most likely the app user "addon_com.nurago.confluence.plugins.treecopy" either does not have permission to read the content or write the new content.
- Ensure group "atlassian-addons" has adequate and correct read/write permissions for the content you are trying to copy.
- Ensure both the currently logged in user and the user "addon_com.nurago.confluence.plugins.treecopy" (Copy Page Tree system add-on user) have permissions to read and write content.
These permissions could be set at the global or space level or the pages might have 'restricted permissions' at the page level.
Related articles