After updating hudson to ver. 1.336 I met an exception thrown by this component. The exception is shown as below.
SEVERE: Executor throw an exception unexpectedly
java.lang.NoClassDefFoundError: hudson/plugins/tasks/util/model/Priority
at hudson.plugins.cigame.rules.plugins.opentasks.OpenTasksRuleSet.loadRules(OpenTasksRuleSet.java:14)
at hudson.plugins.cigame.rules.plugins.PluginRuleSet.getRules(PluginRuleSet.java:48)
at hudson.plugins.cigame.model.ScoreCard.record(ScoreCard.java:33)
at hudson.plugins.cigame.model.ScoreCard.record(ScoreCard.java:54)
at hudson.plugins.cigame.GamePublisher.perform(GamePublisher.java:56)
at hudson.plugins.cigame.GamePublisher.perform(GamePublisher.java:42)
at hudson.tasks.BuildStepMonitor$3.perform(BuildStepMonitor.java:36)
at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:577)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:563)
at hudson.model.AbstractBuild$AbstractRunner.performAllBuildStep(AbstractBuild.java:551)
at hudson.model.Build$RunnerImpl.cleanUp(Build.java:158)
at hudson.model.Run.run(Run.java:1218)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:123)