While configuring DLP to use SAML logins the following exception is observed in the localhost log after implementing the new spring security .xml file:
exception is java.lang.ClassNotFoundException: com.symantec.dlp.login.spring.SymantecRestBasicAuthFilter
Release : 15.8 GA
This is a known issue for 15.8 GA
Upgrade to 15.8 MP1 or later