Been using this for quite some time with no issues, but over the past few days I've run into a problem where it only generates prompts for the first two images, regardless of how many there are in the pile. It's not consistent either, sometimes it generates all and sometimes it stops after the first two.
I'm using Downloader for Onlyfans by Extpose. I was having the same issue and went to manage my extensions. Chrome indicated that the extension was disabled due to violating Chrome Web Store policy. As of writing this the solution I found was just to turn the extension back on since Chrome disabled it and refresh Onlyfans. I've never had an issue with that extension and you can download it directly from the developer's site.
Chrome recently did an update (at least for me) so I think that's why it was disabled; anytime there is a big-ish update it usually happens to me. As for why it only creates prompts for the first two images/videos I don't know why. Unfortunately I don't think they are updating it so we'll have to find another way
Seems the issue for me is something different: