@picchar I don’t know if links would work in a reply but
https://www.tumblr.com/themes/recover
you should be able to click on the blog with the missing theme and then the top theme to recover your most recent theme change (It happened to me yesterday and this was how I fixed it!!)
Thank you! I totally forgot about that feature.
It works, but for some reason it didn’t log my latest theme and only had older ones (including ones that I was just testing, lol). So I’ll just stick to what I edited today, but thank you again! :D
Super usefull. Especially if you’re on mobile and can’t really do anything about it. Just reverted my theme back to what it was.