error

The following error occurred at startup:
Unable to start OpenMRS. Error thrown was: org.openmrs.api.APIException: Service not found: interface org.openmrs.scheduler.SchedulerService
org.openmrs.module.ModuleException: Unable to start OpenMRS. Error thrown was: org.openmrs.api.APIException: Service not found: interface org.openmrs.scheduler.SchedulerService
	at org.openmrs.web.WebDaemon.startOpenmrs(WebDaemon.java:64)
	at org.openmrs.web.Listener.contextInitialized(Listener.java:180)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3988)
	at org.apache.catalina.manager.ManagerServlet.reload(ManagerServlet.java:954)
	at org.apache.catalina.manager.HTMLManagerServlet.reload(HTMLManagerServlet.java:633)
	at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:211)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:213)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:610)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: javax.servlet.ServletException: org.openmrs.api.APIException: Service not found: interface org.openmrs.scheduler.SchedulerService
	at org.openmrs.web.Listener.startOpenmrs(Listener.java:260)
	at org.openmrs.web.WebDaemon$1.run(WebDaemon.java:42)
Caused by: org.openmrs.api.APIException: Service not found: interface org.openmrs.scheduler.SchedulerService
	at org.openmrs.api.context.ServiceContext.getService(ServiceContext.java:755)
	at org.openmrs.api.context.ServiceContext.getSchedulerService(ServiceContext.java:310)
	at org.openmrs.api.context.Context.getSchedulerService(Context.java:529)
	at org.openmrs.module.web.WebModuleUtil.stopTasks(WebModuleUtil.java:382)
	at org.openmrs.module.web.WebModuleUtil.stopModule(WebModuleUtil.java:861)
	at org.openmrs.module.web.WebModuleUtil.stopModule(WebModuleUtil.java:834)
	at org.openmrs.module.web.WebModuleUtil.stopModule(WebModuleUtil.java:834)
	at org.openmrs.module.web.WebModuleUtil.shutdownModules(WebModuleUtil.java:804)
	at org.openmrs.web.Listener.performWebStartOfModules(Listener.java:649)
	at org.openmrs.web.Listener.performWebStartOfModules(Listener.java:609)
	at org.openmrs.web.Listener.startOpenmrs(Listener.java:252)
	... 1 more


See the server log for full output.