What version of Oracle WebCenter Portal are you working on?
From this point we can start wondering if there is any kind of corruption happening in the Policy Store configured.
Please update us with the version of portal as suggested by Daniel and let me know whether this issue is specific to Moderator role or any role.
Let me know what is the error message when accessing the portal when you delete and assign the same role.
Hi Daniel and Sreedhar,
Issue is resolved.