I believe it's a warning (blue), not an error (red)? Keep in mind that warnings are not necessarily problems that need resolving.
Here are some KBs that apply. Causes include targeting Unix systems for Windows agent installs: http://www.symantec.com/docs/TECH178554 http://www.symantec.com/docs/TECH177080 http://www.symantec.com/docs/TECH169876
Does this help?
Thanks that helped.