On the start page Libretime and after login no more files and entries are displayed

On the start page Libretime and after login no more files and entries are displayed. Also all user data are no longer available. Libretime reports OffAir although the stream is online and sends the playlists. With another Porgrammananger is still all available. Two others have the same problem.
Can this be a problem with the user rights ? I don’t want to register a new user because the system works for others. Can someone help me?