Why does the enabling RBAC on JBoss EAP 6.2.x result in the management console returning a HTTP 500 error?

Issue

Why does the enabling RBAC on JBoss EAP 6.2.x result in the management console returning a HTTP 500 error?

09:20:53,024 DEBUG [org.jboss.as.domain.http.api] (HttpManagementService-threads - 1) Unable to create SubjectUserInfo: java.io.IOException: javax.naming.NameNotFoundException: [LDAP: error code 32 - LDAP Error 32 : No Such Object]; remaining name 'CN=ImaTestRole,OU=Administrators,DC=ds,DC=redhat'
    at org.jboss.as.domain.management.security.LdapSubjectSupplementalService$LdapSubjectSupplemental.supplementSubject(LdapSubjectSupplementalService.java:156) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.management.security.SecurityRealmService$1.createSubjectUserInfo(SecurityRealmService.java:191) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.http.server.security.BasicAuthenticator._authenticate(BasicAuthenticator.java:115) [jboss-as-domain-http-interface-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.http.server.security.BasicAuthenticator.authenticate(BasicAuthenticator.java:80) [jboss-as-domain-http-interface-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:64)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:81)
    at org.jboss.sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:710)
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:78)
    at org.jboss.as.domain.http.server.RealmReadinessFilter.doFilter(RealmReadinessFilter.java:47) [jboss-as-domain-http-interface-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.http.server.DmrFailureReadinessFilter.doFilter(DmrFailureReadinessFilter.java:45) [jboss-as-domain-http-interface-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:81)
    at org.jboss.sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:680)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_51]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_51]
    at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
    at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.1.1.Final-redhat-1.jar:2.1.1.Final-redhat-1]
Caused by: javax.naming.NameNotFoundException: [LDAP: error code 32 - LDAP Error 32 : No Such Object]; remaining name 'CN=ImaTestRole,OU=Administrators,DC=ds,DC=redhat'
        at com.sun.jndi.ldap.LdapCtx.mapErrorCode(LdapCtx.java:3112) [rt.jar:1.7.0_51]
    at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:3033) [rt.jar:1.7.0_51]
    at com.sun.jndi.ldap.LdapCtx.processReturnCode(LdapCtx.java:2840) [rt.jar:1.7.0_51]
    at com.sun.jndi.ldap.LdapCtx.c_getAttributes(LdapCtx.java:1332) [rt.jar:1.7.0_51]
    at com.sun.jndi.toolkit.ctx.ComponentDirContext.p_getAttributes(ComponentDirContext.java:231) [rt.jar:1.7.0_51]
    at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:139) [rt.jar:1.7.0_51]
    at com.sun.jndi.toolkit.ctx.PartialCompositeDirContext.getAttributes(PartialCompositeDirContext.java:127) [rt.jar:1.7.0_51]
    at javax.naming.directory.InitialDirContext.getAttributes(InitialDirContext.java:142) [rt.jar:1.7.0_51]
    at org.jboss.as.domain.management.security.LdapGroupSearcherService$PrincipalToGroupSearcher.groupSearch(LdapGroupSearcherService.java:204) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.management.security.LdapSubjectSupplementalService$LdapSubjectSupplemental.loadGroupEntries(LdapSubjectSupplementalService.java:199) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.management.security.LdapSubjectSupplementalService$LdapSubjectSupplemental.loadGroups(LdapSubjectSupplementalService.java:179) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.management.security.LdapSubjectSupplementalService$LdapSubjectSupplemental.loadGroups(LdapSubjectSupplementalService.java:172) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    at org.jboss.as.domain.management.security.LdapSubjectSupplementalService$LdapSubjectSupplemental.supplementSubject(LdapSubjectSupplementalService.java:149) [jboss-as-domain-management-7.3.0.Final-redhat-14.jar:7.3.0.Final-redhat-14]
    ... 15 more