@Richie Thanks Richie. I鈥檝e updated the plugin again to match the latest changes in Discourse (with an assist from @eviltrout).
I won鈥檛 be updating this again to keep up with changes in core Discourse until June 1, so if possible please hold on updating your site again till then. If this is an issue, let me know via PM and I can work something out with you.
We鈥檙e working on a few different things that will help with the problem of plugin compatibility with Discourse updates. Until we release those, we鈥檙e using a time-based approach of updating the plugin to the latest discourse in the first 5 days of every month.