I have problem. When I choose lightbox designer option for product there is a problem. When I click on "add to cart" button I have message to choose options for product like size, color etc. and that's fine but product is going to cart after all. I have no idea what the problem is.
could it be that this option is active?
Try switching it off.
Please open a support ticket and also send a link to the product page with the issue, thanks.