Add Variation button not working

I am trying to create a variable product and I can’t get the “Add Variation” button to display options. I’m running the newest version of both WooCommerce and WordPress, I have tried disabling all of my plugins and I have tried adding variations using both global attributes and product-specific attributes. I also have followed the tutorial.

I have no idea why it’s not showing up – any suggestions? Is there a global setting that I’m missing or something?

https://www.ads-software.com/extend/plugins/woocommerce/