If it is still saying unavailable, try Ctrl + F5 to see if that fixes the issues guys. If this doesn't work you might have to change your settings on the server your viewing from. Hope this helps and also thanks for the chapter.
Probably caught up to the raws and forgot about it since it's a monthly release, then remembered when a chapter was posted by another group.
It's not that uncommon when a group has dozens of projects.
chapter 28 is already out a few days ago, this one needs redrawing, but i dunno how to draw, i'm really bad at it. I like arts but the arts just don't like me lol