This morning the Kanban plugin for on-demand stopped working because the version had expired. A new version had been posted to the FogBugz Plugin Gallery, but we didn't make it part of our regular on-demand deployment pending further review. We have stricter plugin review policies for on-demand plugin deployment due to the risk of a plugin exposing data from one account to another or hurting on-demand performance. Unfortunately, before this review was completed, the version being used expired.
In response, we prioritized the plugin review process and have a fix ready to go out tonight. Customers who are actively being affected by this plugin outage can contact support to have their account upgraded immediately (with an accompanying minute or so of downtime).