Thread:Extension talk:CategoryTree/Problem loading data. Please wait a moment and try again/reply (2)

I got this fixed today. It turns out that HotCat from https://commons.wikimedia.org/wiki/MediaWiki:Gadget-HotCat.js fixed my issue. There must be some caching going on somewhere though as it took a number of hours for my wiki to start working again. Apparently this problem struck Commons around Jan.14th or so. Hence, the updated HotCat.