Post voting not recording votes

I originally had the post voting plugin working great on a website of mine but at some point it has stopped.

I did migrate the site from one multisite to another but I can't figure out where the problem is. I deactivated and reactivated. I switched themes. I deleted and reinstalled the plugin. I have no new plugins running on the network that I can think of.

The site is Meals on Meals. Any tips are greatly appreciated.