Save Category does not work in Categories setting

Good thinking. :+1:

I don’t think it’s Custom Header Links as I’ve tried that and everything works, and I also have the default theme so it’s unlikely to be that by itself.

Have you added in any extra pieces to the default theme in the ‘Edit CSS/HTML’ section? Or anything special in the House Ads amendments? Disabling what you can to narrow it down will help as well.