Team Calendar doesn't sync with "JIRA Issue Dates" event type for change management

22-Sep-2017 14:25:45.567 SEVERE [http-nio-8090-exec-11   url:/rest/calendar-services/1...events.json username:userx ] com.sun.jersey.spi.container.ContainerResponse.logException Mapped exception to response: 500 (Internal Server Error)
 javax.ws.rs.WebApplicationException
	at com.atlassian.confluence.extra.calendar3.rest.resources.EventResource.getEvents(EventResource.java:502)
	at sun.reflect.GeneratedMethodAccessor2013.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.atlassian.plugins.rest.common.interceptor.impl.DispatchProviderHelper$ResponseOutInvoker$1.invoke(DispatchProviderHelper.java:192)
	at com.atlassian.plugins.rest.common.interceptor.impl.DispatchProviderHelper$1.intercept(DispatchProviderHelper.java:83)
	at com.atlassian.plugins.rest.common.interceptor.impl.DefaultMethodInvocation.invoke(DefaultMethodInvocation.java:53)
	at com.atlassian.confluence.extra.calendar3.rest.Interceptors.TeamCalResourceLoggingInterceptor.intercept(TeamCalResourceLoggingInterceptor.java:21)
	at com.atlassian.plugins.rest.common.interceptor.impl.DefaultMethodInvocation.invoke(DefaultMethodInvocation.java:53)
	at com.atlassian.plugins.rest.common.transaction.TransactionInterceptor$1.doInTransaction(TransactionInterceptor.java:27)
	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:21)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor$1.doInTransaction(SpringHostContextAccessor.java:71)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor.doInTransaction(SpringHostContextAccessor.java:68)
	at com.atlassian.confluence.spring.transaction.interceptor.ConfluenceSpringHostContextAccessor.access$001(ConfluenceSpringHostContextAccessor.java:21)
	at com.atlassian.confluence.spring.transaction.interceptor.ConfluenceSpringHostContextAccessor.lambda$doInTransaction$3(ConfluenceSpringHostContextAccessor.java:72)
	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContextInternal(VCacheRequestContextManager.java:87)
	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:71)
...

2017-09-22 14:25:45,563 ERROR [http-nio-8090-exec-11   url:/rest/calendar-services/1...events.json username:userx ] [extra.calendar3.calendarstore.JiraCalendarDataStore] getSubCalendarContentInternal The JQL query for project = "PROJ" didn't return any results. Try changing the query.
 -- referer: https://confluence.mycompany.com/display/SPA/calendars | url: /rest/calendar-services/1.0/calendar/events.json | traceId: ca491ad63600b2c4 | userName: userx
2017-09-22 14:25:45,564 ERROR [http-nio-8090-exec-11   url:/rest/calendar-services/1...events.json username:userx ] [extra.calendar3.rest.AbstractResource] getEvents Unable to load events of sub-calendar 49d9082e-44e1-4e94-9623-6172c3201074
 -- referer: https://confluence.mycompany.com/display/SPA/calendars | url: /rest/calendar-services/1.0/calendar/events.json | traceId: ca491ad63600b2c4 | userName: userx
2017-09-22 14:25:45,565 WARN [http-nio-8090-exec-11   url:/rest/calendar-services/1...events.json username:userx ] [confluence.impl.hibernate.ConfluenceHibernateTransactionManager] doRollback Performing rollback. Transactions:
  ->[PluginReadWriteTx]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT (Session #279009541)
 -- referer: https://confluence.mycompany.com/display/DANT/calendars | url: /rest/calendar-services/1.0/calendar/events.json | traceId: ca491ad63600b2c4 | userName: userx