Clicking on "rest browser" link under API in channel manager edit mode results in HTTP 404 error

Steps to reproduce:-->
1.Open English channel in edit mode.
2.Go to About page.
3.click on "rest browser" link under API.
4.HTTP 404 error & below warnings are logged:-->
------------------------------------------------
[INFO] [talledLocalContainer] 17.04.2015 14:27:08 WARN [org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.processRequest():166] No root resource ma
tching request path /site/restapi/ has been found, Relative Path: /. Please enable FINE/TRACE log level for more details.
[INFO] [talledLocalContainer] 17.04.2015 14:27:08 WARN [org.apache.cxf.jaxrs.impl.WebApplicationExceptionMapper.toResponse():72] javax.ws.rs.NotFound
Exception: HTTP 404 Not Found
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.utils.SpecExceptions.toNotFoundException(SpecExceptions.java:89)
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.utils.ExceptionUtils.toNotFoundException(ExceptionUtils.java:126)
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.processRequest(JAXRSInInterceptor.java:169)
[INFO] [talledLocalContainer] at org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.handleMessage(JAXRSInInterceptor.java:77)
[INFO] [talledLocalContainer] at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:307)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:251)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:223)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:197)
[INFO] [talledLocalContainer] at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:149)
[INFO] [talledLocalContainer] at org.hippoecm.hst.jaxrs.cxf.CXFJaxrsService.invoke(CXFJaxrsService.java:147)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.JaxrsRestServiceValve.invoke(JaxrsRestServiceValve.java:38)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.GenericResponseHeadersValve.invoke(GenericResponseHeadersValve.java:83)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.SubjectBasedSessionValve.invoke(SubjectBasedSessionValve.java:58)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.SecurityValve.invoke(SecurityValve.java:68)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.CmsSecurityValve.invoke(CmsSecurityValve.java:123)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.InitializationValve.invoke(InitializationValve.java:50)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline$Invocation.invokeNext(HstSitePipeline.java:269)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline.invokeValves(HstSitePipeline.java:170)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstSitePipeline.invoke(HstSitePipeline.java:153)
[INFO] [talledLocalContainer] at org.hippoecm.hst.core.container.HstRequestProcessorImpl.processRequest(HstRequestProcessorImpl.java:79)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.HstDelegateeFilterBean.processResolvedSiteMapItem(HstDelegateeFilterBean.java:638)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.HstDelegateeFilterBean.doFilter(HstDelegateeFilterBean.java:351)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.DelegatingFilter.doFilter(DelegatingFilter.java:84)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.HstFilter.doFilter(HstFilter.java:51)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
[INFO] [talledLocalContainer] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.hst.container.XSSUrlFilter.doFilter(XSSUrlFilter.java:49)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
[INFO] [talledLocalContainer] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
[INFO] [talledLocalContainer] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
[INFO] [talledLocalContainer] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:223)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1517)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1474)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:745)