Virtue theme with booking system pro

Hello there

Great theme,really want to use it on a site i’m building. I am using the booking system pro plugin in conjunction with your theme, it uses variations to add a calendar to a woocommerce product. But when the user fills in the calendar it doesn’t seem to register the action and states that no product options have been selected. Would you have any ideas of why this might be?

I have contacted booking system pro support and so far they have been most unhelpful, so I thought I would see what you thought.

Here is a link to the dev site: https://studer.harryrook.webfactional.com/

thanks for any help in advance.