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javax.servlet.ServletException: org.apache.commons.jelly.JellyTagException: jar:file:/var/cache/jenkins/war/WEB-INF/lib/jenkins-core-1.588.jar!/lib/form/descriptorList.jelly:78:49: <j:forEach> class hudson.plugins.xvnc.DisplayAllocator$Property is missing its descriptor	at org.kohsuke.stapler.jelly.JellyFacet$1.dispatch(JellyFacet.java:103)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)	at org.kohsuke.stapler.MetaClass$12.dispatch(MetaClass.java:391)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)	at org.kohsuke.stapler.Stapler.invoke(Stapler.java:876)	at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:211)	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:746)