Hello,
Please see these KB's with a possible solution.
Home, Monitors, and Reports tabs are blank in the Symantec Endpoint Protection Manager Remote Console
http://www.symantec.com/business/support/index?page=content&id=TECH103832
The Home, Monitors, and Reports tabs in the Endpoint Protection Manager aren't loading completely - Images and graphs are missing.
http://www.symantec.com/business/support/index?page=content&id=TECH103853&locale=en_US
Symantec Endpoint Protection Manager: Home, Reports, and Monitor pages are blank and no error messages are displayed
http://www.symantec.com/business/support/index?page=content&id=TECH103156&actp=search&viewlocale=en_US&searchid=1291828872045
Moving the thread to the proper forum.
https://www-secure.symantec.com/connect/security/forums/endpoint-protection-antivirus