Encounter Rest API End Point Error

"error": {
        "message": "The Resource Does not Support the Requested Operation [null]",
        "code": "org.openmrs.module.webservices.rest.web.resource.impl.DelegatingCrudResource:245",
        "detail": "org.openmrs.module.webservices.rest.web.response.ResourceDoesNotSupportOperationException\n\tat org.openmrs.module.webservices.rest.web.resource.impl.DelegatingCrudResource.doGetAll(DelegatingCrudResource.java:245)\n\tat org.openmrs.module.webservices.rest.web.resource.impl.DelegatingCrudResource.getAll(DelegatingCrudResource.java:232)\n\tat org.openmrs.module.webservices.rest.web.v1_0.controller.MainResourceController.get(MainResourceController.java:209)\n\tat sun.reflect.GeneratedMethodAccessor1432.invoke(Unknown Source)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:177)\n\tat org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)\n\tat org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:621)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:728)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.module.web.filter.ForcePasswordChangeFilter.doFilter(ForcePasswordChangeFilter.java:60)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:73)\n\tat org.openmrs.web.filter.GZIPFilter.doFilterInternal(GZIPFilter.java:65)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.openmrs.module.webservices.rest.web.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:105)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.openmrs.module.webservices.rest.web.filter.ContentTypeFilter.doFilter(ContentTypeFilter.java:64)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:82)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.openmrs.module.xforms.web.XformsFilter.doFilter(XformsFilter.java:69)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.openmrs.module.referenceapplication.filter.RequireLoginLocationFilter.doFilter(RequireLoginLocationFilter.java:93)\n\tat org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:71)\n\tat org.openmrs.module.web.filter.ModuleFilter.doFilter(ModuleFilter.java:57)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.OpenmrsFilter.doFilterInternal(OpenmrsFilter.java:109)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:150)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:492)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:165)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452)\n\tat org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1201)\n\tat org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:654)\n\tat org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:317)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\n"
    }
}