An error has occurred. Please contact your administrator for more information. Error was: java.lang.NullPointerException

2013-01-24 15:11:18,397 ERROR [btpool0-20 ] atlassian.fecru.plugin.reviewissuetransition ReviewIssueTransitionsServlet-renderAjaxExceptionMsg - Error encountered in the Crucible review issue transition plugin
java.lang.NullPointerException
	at com.atlassian.fecru.plugin.reviewissuetransition.web.ReviewIssueTransitionsServlet.renderAvailableTransitions(ReviewIssueTransitionsServlet.java:187)
	at com.atlassian.fecru.plugin.reviewissuetransition.web.ReviewIssueTransitionsServlet.doPost(ReviewIssueTransitionsServlet.java:159)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at com.atlassian.plugin.servlet.DelegatingPluginServlet.service(DelegatingPluginServlet.java:42)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at com.atlassian.fisheye.plugin.servlet.FisheyeServletModuleContainerServlet.service(FisheyeServletModuleContainerServlet.java:61)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
	at org.mortbay.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1272)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
	at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25)