Works without a problem for me.
Just tried on the page you linked:
https://prnt.sc/WnhLsuWOU4I3

Are you already ignoring 100 curators? Thats the max limit you can ignore, after that you just get an error message if you try to ignore additional ones.

Took us awhile to find it* but I've only ignored 13 pages, according to our presets anyways.. and only following 3. Wasn't aware it was capped either so cheers for that. I'll probably go through them again another time and be more selective.

https://store.steampowered.com/curators/ignored_curators/?

Cheers bud

Just realised title could be misleading so I changed it. The link in the first post is to a developer page, the option to ignore them says 'Ignore Creator' - this is different to ignoring a Curator but the verbiage is the same.

Link from first post, check the options cog on the right:
https://store.steampowered.com/developer/dendagames

Curator page, check the options cog on the right:
https://store.steampowered.com/curator/44858017-Sweet-Baby-Inc-detected/

Either way appreciate the help, it's gotta be something on my end o7

After looking into it, it seems there is a COMBINED limit of ignoring developers, curators and publishers.
So if you reach 100 combined from those 3 categories you can not ignore anything new and get an error.
So maybe thats what happened?

I think you're correct (meant to come back and edit the post but got carried away :D). I took somebody off the Ignore list and added a different page and it worked so must be combined.

I've been ignoring all the AI/Hidden Object games but there's too many of them. Cheers again Ogami. Shame it's limited though because you can ignore games and dlc to no end (on 70k as is).