jQuery Nice Select library not working in eCommerce variants

Hi there

I just built this part of my store product page, where there are product variants inside this dropdown. Now because I think Webflows default dropdown/select is very ugly I wanted to overwrite it with https://jqueryniceselect.hernansartorio.com/. But for some reason, it’s not working anymore to add the product to the cart. The dropdown overwrites works as you see in the screenshot. I get this message below after the attempt to add it to the cart.

Seems like there could be an issue with the variants that are displayed dynamically in the designer.
Because when I disconnect the jQuery Nice Select it works again normally.

Has anyone experienced this issue?

Thanks, appreciate it!