We have multiple students who can no longer access their pdf documents and previously downloaded textbooks now that they have moved to iOS 12. Once they upgraded, "iBooks" disappeared and "Books" appeared. All of their pdf documents and textbook show up in the new "Books" app. However, when they click on one of the documents or a book to open it, they get this warning: "Cannot Open Document. Unable to Open NameofDocumentHere."
All of our students have Managed Apple IDs. We never had any issue prior to iOS 12 letting them save or copy items to iBooks.
Any advice?
