After a successful login as super admin in 12.1.1 using Firefox 28.0, a message appears on screen as "XML Parser Failure: The element type must be terminated by the matching end-tag." Clicking on any feature immediately returns to the login screen. I am not aware of any configuration changes over the last day. Yesterday, no message. Any ideas?
I still do not know how to prevent this error, but Oracle Support provided the following solution: "How To Restart the AVDF Job Framework (Doc ID 1592181.1)"