jenkinsci/configurationslicing-plugin — pull request #10 by ninian (2014-10-05 01:28:21+00:00)
Title: JENKINS-16869: Exception when clicking on timestamper link

you can see the timestamper configuration slicer even when the timestamper plugin is not installed, which gives you this error (though this is not the problem reported as such). I've made a change so that the button is not enabled if the plugin is not
available.