Hello Haitham Alhendal,
We found only one product on your website http://www.alhindalstud.com/shop/. Firstly, this one product is not a variable product. Please see screenshot https://drive.google.com/file/d/1hiedOM9lr_9WctJcuzMmkBBMG-yitofz/view?usp=sharing. I request you to turn it into variable product from admin backend, test it and share your findings.
Secondly, should you be referring to the product options you added to your product. We like to let you know that our plugin supports both woocommerce simple and variable product so can handle product variations as you can test on the plugin demo website. We developed this plugin for purely woocommerce and do not provide support for any third-party add-ons if used on any website.