Prestige Theme Variant Selector not working?

On a product with two variants, the selector is not working. Something “pops up” but it is completely white with no text inside. Can anyone help with what might be the problem? Thank you!

Site: artgallery.devonhorseshow.net - password to enter is jeannedevon

Product is the featured product on the homepage

Thank you so much for your help

Answered my own question by changing from dropdown to block selector. No answer for the dropdown, but the block selector will do!