2941876 - 500 Internal Server Error on accessing NWA

When accessing NWA or irj/portal on your system, getting an internal server error post migration to 7.5 version on.

source & then export/import to build new system on hana(using swpm)
Except /start page other links are not working.

Checking the default trace file for the log id you will see the following exception:

Cannot process an HTTP request to servlet [dispatcher] in [webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd] web application.
For more details on the problem please check traces searching by logId: C0000XXXXXXXXXXXXXXXXX#

[OR]

500 Internal Server Error is returned for HTTP request [http://10.12.28.21:50200/webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd/FloorPlanApp]:
component [dispatcher],
web module [webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd],
application [sap.com/tc~lm~itsam~ui~mainframe~wd],
DC name [sap.com/tc~lm~itsam~ui~mainframe~wd],
CSN component[BC-NWA-INC-UIF],
problem categorization [com.sap.ASJ.web.000137],
internal categorization [-670440222]

[EXCEPTION]
java.lang.NoClassDefFoundError: com/sap/security/core/util/ErrorBean
....
at com.quest.vsj.netweaver.login.VsjLoginModule.login(VsjLoginModule.java:116)
....
Caused by: java.lang.ClassNotFoundException: com.sap.security.core.util.ErrorBean
--------------------------------------Loader Info-----------------------------------
ClassLoader name: [library:quest.com~com.quest.vsj.netweaver.login]

SAP Netweaver Application Server

exception,NWA, NetWeaver, Administration, 500,internal, server, error,log, ID,login, module,remove,authentication,stack,
VsjLoginModule,ErrorBean,quest , KBA , BC-JAS-ADM-ADM , Administration , Problem