If I choose the first option of Multi Variant products, the product page is not reloaded and I can not choose the second option. I can only see "Please select" and no other values.

demo.virtuemart.net/multi-variant-detail

The problem is already known and is due to the fact that the template is not compatible with the new version of VM.

Dear freestyler

Thanks for your information.
we are updating our theme support for the view version of VM and inform to you when it available.

Thanks