This is an offshoot of this forum post that got no reply, because HotCat marginally worked on UCP (addition worked on most pages, subtraction did not) but works exactly 0% on FandomDesktop: https://dev.fandom.com/f/p/4400000000000003077
I really miss HotCat--I used it a lot on the wiki(s) I admin back before UCP (when pulling an old version of it from Wikimedia Commons worked perfectly) and I decided to see if porting it to FandomDesktop js would get it working the way it used to work (instead of the half-working it was on UCP Oasis)... but it doesn't work at all. Maybe the fix is simple... but maybe considering the way the category... object? is on FandomDesktop... maybe it's more difficult.
Point is, the 1.19-compatible version I was pulling from Commons stopped working on UCP (or rather it caused severe breakage), the more modern version I had hoped to use on UCP only half worked and now it no-works, with FandomDesktop. XP
I want to use HotCat, but it's looking like vanilla HotCat is no longer compatible with Wikia. :-/