It stopped working on posts

I tried this plugin and it seemed to work okay at first. I wanted to use it for WooCommerce products. I started clicking things on and off to see which icons I wanted to use. Then I went into display settings and chose “navigate in same category” which I was super excited about because that’s the problem I’m trying to solve.

Well, then it stopped working, the arrows are now grayed out. I tried deactivating and reactivating the plugin and that did not work. It seems to work on some (but not all) pages, but no longer on posts.