Jira Calendar creation is failing

Error(s) occurred.      Unable to load events of CSP calendar (3f4d9d85-6282-4f87-bd71-4003a1aeadd5): Unable to read response from http://jira.champ.aero/rest/ical/1.0/ical/project/CSP/events.ics?_=1307721847834&includeFixVersions=true as iCalendar text. 

2011-06-10 15:01:45,759 TP-Processor2 ERROR couri 901x2x1 1yk5fq8 10.2.144.11 /rest/ical/1.0/ical/project/CSP/events.ics [jira.extra.i  calfeed.IcalendarResource] Unable to export issues to iCalendar
java.lang.NullPointerException
        at com.atlassian.jira.extra.icalfeed.IcalendarResource.toIcalendar(IcalendarResource.java:186)
        at com.atlassian.jira.extra.icalfeed.IcalendarResource.search(IcalendarResource.java:178)
        at com.atlassian.jira.extra.icalfeed.IcalendarResource.getIcalendarByProject(IcalendarResource.java:133)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.atlassian.plugins.rest.common.interceptor.impl.DispatchProviderHelper$ResponseOutInvoker$1.invoke(DispatchProviderHelpe  r.java:206)
        at...