Thanks Karen Wickert for reporting this, as far I understand it, it's not related to the jenkins infrastructure project so I move it here in order to catch attention from the people who can help
Could we get someone to respond to this? I'm getting the same error and it is not very obvious what is required to do to get this plugin to work. I have found [this|https://file-leak-detector.kohsuke.org/], however it is not obvious if the plugin ships this with it, we are required to install it on our own, etc. More information would be appreciated.