500 internal server error while accessing http://<servername>:port/em

User_W03X1

please help us to resolve below issue

Error 500--Internal Server Error

javax.servlet.UnavailableException: Service is not initialized correctly. Verify that the repository-less configuration is correct.
	at oracle.sysman.eml.app.ContextInitFilter.handleNoSecureTargetRepolessMode(ContextInitFilter.java:633)
	at oracle.sysman.eml.app.ContextInitFilter.doFilter(ContextInitFilter.java:274)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at oracle.adfinternal.view.faces.caching.filter.AdfFacesCachingFilterImpl.doFilter(AdfFacesCachingFilterImpl.java:134)
	at oracle.adf.view.rich.webapp.AdfFacesCachingFilter.doFilter(AdfFacesCachingFilter.java:66)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at oracle.sysman.eml.app.EMSecurityFilter.doFilter(EMSecurityFilter.java:189)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at oracle.sysman.core.app.exception.EMRuntimeExceptionFilter.doFilter(EMRuntimeExceptionFilter.java:81)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at oracle.security.jps.ee.http.JpsAbsFilter$3.run(JpsAbsFilter.java:172)
	at java.security.AccessController.doPrivileged(Native Method)
	at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:315)
	at oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:650)
	at oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:110)
	at oracle.security.jps.ee.http.JpsAbsFilter.doFilterInternal(JpsAbsFilter.java:273)
	at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:147)
	at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:94)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:248)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:32)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3706)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3672)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:344)
	at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
	at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
	at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
	at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2443)
	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2291)
	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2269)
	at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1705)
	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1665)
	at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:272)
	at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:352)
	at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:337)
	at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:57)
	at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
	at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:652)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:420)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:360)