Hi!
I think there is an error triggered somewhere within the middle of the archive page, so that none of the page scripts are loaded, as the page rendering stops there with an invalid HTML output, see the source here: https://i.imgur.com/BwH8xoc.png
..for this page: https://intranet.ptanc.com/category/epic-order-info/
It looks like the code is it’s somewhere in the sidebar area, within a social media button container of some sort, and then it suddenly stops, I guess by a fatal error, that is not reported. Once you resolve that, the page will load properly, and the scripts (including the plugins) will load, and it should start working.