Post Honey-Nut Cheerio's Things

When I try to add a new story on the mangago site to reading/read, especially if I want to subscribe to updates, it opens up the pop up but it's completely blank! No suggested tags or anything, and I can't even add in my own, it's entirely frozen. I can't even exit out of the pop up either, I have to reload the entire page, and I definitely can't save it (without any tags to just get the updates as a last resort) which is annoying...

Has this happened to anyone else? Does anyone have any suggestions on how to fix it? I've tried logging in and out a couple of times and switching from mobile and desktop versions to see if that made any difference, but alas...