Dear all, I edit the data source, it return the error Error MessageThere was an error on the server. Try again or contact site administrators. (Error UID: 30c6f2b4-5aad-40d2-84f9-9f9c68cf47c7) I also delete a user, it returns the error There was an error on the server. Try again or contact site administrators. (Error UID: 743eced2-eb3b-4372-b7e0-41e7a9f29fd6) It seems that the Jaspsersoft report server got something crash I am using the jasperReports Server CE v7.8.0 Please help Regards, Eldon