This suddenly started for us.  I've not had a lot of chance to troubleshoot.   Could this be the fact we don't use automated installers but an "install directory"?

14:15:57 java.lang.NullPointerException*14:15:57* at org.jenkinsci.plugins.DependencyCheck.DependencyCheckToolBuilder.isSuccess(DependencyCheckToolBuilder.java:178)14:15:57 at org.jenkinsci.plugins.DependencyCheck.DependencyCheckToolBuilder.perform(DependencyCheckToolBuilder.java:165)14:15:57 at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)14:15:57 at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)14:15:57 at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:818)14:15:57 at hudson.model.Build$BuildExecution.build(Build.java:199)14:15:57 at hudson.model.Build$BuildExecution.doRun(Build.java:164)14:15:57 at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:526)14:15:57 at hudson.model.Run.execute(Run.java:1900)14:15:57 at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:44)14:15:57 at hudson.model.ResourceController.execute(ResourceController.java:101)14:15:57 at hudson.model.Executor.run(Executor.java:442)