See the below thread and article which can help you to troubleshoot on symantec management server error
https://www-secure.symantec.com/connect/forums/settingsall-settingsnotification-serverdatabase-settings-symantec-management-server-error
Getting an error 'Symantec Management Server Error' page when trying to view inventory from the Resource Manager screen.
http://www.symantec.com/docs/TECH170970
Error "Symantec Management Server Error" occurs after closing a Data Connector import rule Connector Rule Run Status window
http://www.symantec.com/docs/TECH210846