In Bamboo we can set Requirements for a build stage (Bamboo URL is /build/admin/edit/defaultBuildRequirement.action). On this screen there is a 'Search for a capability' box. On our Bamboo server, attempting to search for anything in this box would generate a ' java.lang.NullPointerException' popup from Bamboo, making it impossible to search.
I ran through the issue with Atlassian support, and they diagnosed it as being related to Bamboozled. I can confirm that if I disable the Bamboozled Ruby Plugin, the NullPointerException no longer occurs.
Bamboozled Ruby Plugin Version: 5.10.3
Atlassian Bamboo version 5.11.3