Extra Product Plugin and Ocean WP

I have following problem:

I use WooCommerce TM Extra Product Options along with Ocean WP to add special option to products.

I have added a product option with radio buttons, to select from various colors of bracelet.

On product level selection is working – I can select any color by choosing its picture.
However when color is selected, and when user is proceeding to cart no matter what color have been selected, in the cart the selected color is always the last one from the order set in radio buttons options.
In my case it is always green.
It means than no color can be chooses ??
Plugin developer replay be like this:

“The problem is with your theme’s ajax add to cart solution. It posts data to the server incorrectly which is why you have that issue. you should disable it.”

So, My first reaction is to uncheck checkbox in Woocommerce – Settings – Products – ajax add to cart – but no effect.

Second move is to switch to other theme, like Astra – and selection works perfectly.

Question – I want to keep Ocean WP, I did a lot of work on website, and really like OWP…

How can I disable ajax add to cart from the ocean WP theme?

The page I need help with: [log in to see the link]