I have a single portlet in Oracle Portal that is returning the message "Error: The listener returned the following error: 404 Not Found" that is occurring for just 2 out of my 350+ users. I have tried clearing user cache, clearing portlet cache, deleting these two users from portal and recreating their accounts, changing their usernames, rebooting the entire app server and nothing is working. There are other users for which the portlet will return the exact same data that the 2 problem users are requesting without an issue.
Portal version is 10.1.2.3. Any help that anyone can provide would be greatly appreciated as I am about ready to beat my head against a wall.