Lost extension to embed a list query in Confluence

[Peter Kjersgard]

Prior to the latest Confluence update, I was able to add an extension to embed the results of an HTML query into our bug system (Redmine); displaying the results of the query in a Confluence page. After the update, I get "Error loading the extension".

It seems it there are legacy extensions, but they are unavailable.

What I want to do is display the results of a query in Redmine embedded in the section of a Confluence page.