Product Variations

Since installing this theme, I cannot get more then 20 product variations to work. After 20 variations it says “Sorry, this product is unavailable. Please choose a different combination.” No matter what I do, If I drop the variations to 20, they all work. Many of my products have up to 50 variations or more. This is a serious issue and limiting my business.

You can see the problem first hand by visiting this product witch ive started
https://www.mntarpandliner.com/shop/rush-co-marine/dura-lift/18oz-fabric-dura-lift/

I also received a notice from Wordpress that the current theme has files that arent compatiable with the current version.