Not sure if you’re experiencing the same problem I had. After updating to 2.1.12 the variable pricing disappeared. When you clicked on the variable, no price would show up, and no “add to cart” button. The variable option (size) was still visible, just the pricing wouldn’t show. After a lot of testing and backing up, I deleted 2.1.12 and installed 2.1.8 (my last working version) and all is well again.