Received a Credentials Exception error message when trying to login to Workplace

Symptom

Error Message:
Credentials Exception

Exception Class:
com.filenet.wcm.toolkit.util.WcmException

Stack Trace:
Credentials Exception
at com.filenet.wcm.toolkit.server.base.WcmSignInPolicy.encodeTokenException (WcmSignInPolicy.java:345)
at com.filenet.wcm.toolkit.server.base.WcmSignInPolicy.getSignInURL (WcmSignInPolicy.java:332)
at com.filenet.wcm.toolkit.server.base.WcmSignInPolicy.doSignIn (WcmSignInPolicy.java:301)
at com.filenet.wcm.apps.server.controller.WorkplaceSignInPolicy.doSignIn (WorkplaceSignInPolicy.java:77)
at com.filenet.wcm.toolkit.server.base.WcmController.login (WcmController.java:3203)
at com.filenet.wcm.toolkit.server.base.WcmController.performLoginTests (WcmController.java:3551)
...
Root Exception:
Credentials Exception
at com.filenet.wcm.toolkit.server.base.WcmSignInPolicy.setCredentials (WcmSignInPolicy.java:530)
at com.filenet.wcm.apps.server.controller.WorkplaceSignInPolicy.setCredentials (WorkplaceSignInPolicy.java:98)
at com.filenet.wcm.toolkit.server.util.SSLSignInToken.authenticate (SSLSignInToken.java:112)
at com.filenet.wcm.toolkit.server.base.InternalTokenPolicy.setCredentials (InternalTokenPolicy.java:84)
...
Root Exception:
com.filenet.wcm.api.InvalidCredentialsException: com.filenet.api.exception.EngineRuntimeException;The user is not authenticated. Message was: null [Code=null]; OMFC/TheNetwork/NoOp//E_NOT_AUTHENTICATED
at sun.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance (NativeConstructorAccessorImpl.java:56)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance (DelegatingConstructorAccessorImpl.java:39)
...
Caused by: com.filenet.api.exception.EngineRuntimeException: FNRCE0040E: E_NOT_AUTHENTICATED: The user is not authenticated. Message was: null errorStack={
at com.filenet.apiimpl.core.UserPasswordToken.getSubject (UserPasswordToken.java:121)
at com.filenet.api.util.UserContext.createSubject (UserContext.java:288)
at com.filenet.wcm.api.impl.bd.RcBd.createAndCacheSubject (RcBd.java:206)
at com.filenet.wcm.api.impl.bd.RcBd.doRpc (RcBd.java:123)
...
Caused by: com.ibm.websphere.security.auth.WSLoginFailedException
at com.ibm.ws.security.ltpa.LTPAServerObject.authenticate (LTPAServerObject.java:1007)
at com.ibm.ws.security.server.lm.ltpaLoginModule.login (ltpaLoginModule.java:659)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:60)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke (Method.java:611)
..
Caused by: com.ibm.websphere.wim.exception.WIMException: com.ibm.websphere.wim.security.authz.AuthSystemException: CWWIM2001E Initialization of the authorization component failed.
at com.ibm.ws.wim.env.was.JACCAuthorizationService.initialize (JACCAuthorizationService.java:172)
at com.ibm.ws.wim.env.was.JACCAuthorizationService.runAsSuperUser (JACCAuthorizationService.java:1061)
at com.ibm.ws.wim.security.authz.ProfileSecurityManager.runAsSuperUser (ProfileSecurityManager.java:285)
at com.ibm.ws.wim.registry.WIMUserRegistry.checkPassword (WIMUserRegistry.java:185)
... 91 more
Caused by: java.security.PrivilegedActionException: com.ibm.websphere.wim.security.authz.AuthSystemException: CWWIM2001E Initialization of the authorization component failed.
at java.security.AccessController.doPrivileged (AccessController.java:258)
at com.ibm.ws.wim.env.was.JACCAuthorizationService.initialize (JACCAuthorizationService.java:165)
... 94 more
Caused by: com.ibm.websphere.wim.security.authz.AuthSystemException: CWWIM2001E Initialization of the authorization component failed.
at com.ibm.ws.wim.security.authz.jacc.JACCSecurityManager.<init> (JACCSecurityManager.java:196)
at com.ibm.ws.wim.security.authz.jacc.JACCPolicyDefinition.<init> (JACCPolicyDefinition.java:130)
...
Caused by: java.lang.ClassCastException: org.apache.xerces.jaxp.validation.XMLSchemaFactory incompatible with javax.xml.validation.SchemaFactory
at javax.xml.validation.SchemaFactory.newInstance (Unknown Source)
at com.ibm.sec.authz.provider.config.XMLConfigParser.<init> (XMLConfigParser.java:67)
at com.ibm.sec.authz.provider.config.CommonAuthzConfiguration.<init> (CommonAuthzConfiguration.java:61)
at com.ibm.ws.wim.security.authz.jacc.JACCSecurityManager.<init> (JACCSecurityManager.java:182)
... 101 more