Looks like this was a bug fixed in 12.1.2:
The Security Status shows attention needed, but the details pane does not show a problem
Fix ID: 2769815
Symptom: The Home tab says "Security Status - Attention Needed" but clicking on View Details shows everything is good (green).
Solution: Added "License Problem" to the Security Status Detail page.
http://www.symantec.com/docs/TECH199676
The latest version os 12.1.6 MP4 so I would suggest getting to that version.