Can we add an error string with some relevant details, e.g., what files we're trying to look at that the user doesn't have permissions to view, or whatever other information will make the shortest path to the user figuring out what's wrong? For example, what if there's a file that should be editable by a regular user, but isn't because of some mistake (like on Unix when you accidentally sudo and then stuff fails because you have root-owned files in your home dir).