The following error occurred at startup:
Unable to start OpenMRS. Error thrown was: org.openmrs.module.MandatoryModuleException: The following modules are marked as 'mandatory' but were unable to start: sync
org.openmrs.module.ModuleException: Unable to start OpenMRS. Error thrown was: org.openmrs.module.MandatoryModuleException: The following modules are marked as 'mandatory' but were unable to start: sync
	at org.openmrs.web.WebDaemon.startOpenmrs(WebDaemon.java:65)
	at org.openmrs.web.Listener.contextInitialized(Listener.java:196)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5010)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5504)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:632)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1073)
	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: javax.servlet.ServletException: org.openmrs.module.MandatoryModuleException: The following modules are marked as 'mandatory' but were unable to start: sync
	at org.openmrs.web.Listener.startOpenmrs(Listener.java:255)
	at org.openmrs.web.WebDaemon$1.run(WebDaemon.java:42)
Caused by: org.openmrs.module.MandatoryModuleException: The following modules are marked as 'mandatory' but were unable to start: sync
	at org.openmrs.module.ModuleUtil.checkMandatoryModulesStarted(ModuleUtil.java:923)
	at org.openmrs.module.ModuleUtil.startup(ModuleUtil.java:144)
	at org.openmrs.api.context.Context.startup(Context.java:841)
	at org.openmrs.web.Listener.startOpenmrs(Listener.java:246)
	... 1 more