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javax.ws.rs.WebApplicationException: java.lang.NullPointerException	at com.atlassian.confluence.extra.calendar3.rest.CalendarResource$19.write(CalendarResource.java:1495)	at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:71)	at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:57)	at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1437)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:178)	at com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)	at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:73)